/usr/bin/java -Xmx8000000000 -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/chromosome-opt-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 19:52:20,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 19:52:20,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 19:52:20,624 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 19:52:20,694 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 [2021-06-12 19:52:20,730 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 19:52:20,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 19:52:20,731 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 19:52:20,731 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 19:52:20,733 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 19:52:20,733 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 19:52:20,733 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 19:52:20,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 19:52:20,734 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 19:52:20,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 19:52:20,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 19:52:20,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 19:52:20,735 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 19:52:20,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 19:52:20,735 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 19:52:20,735 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 19:52:20,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 19:52:20,736 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 19:52:20,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 19:52:20,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 19:52:20,736 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 19:52:20,736 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 19:52:20,736 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 19:52:20,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 19:52:20,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 19:52:20,737 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 19:52:20,737 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 19:52:20,737 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 19:52:20,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 19:52:20,737 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 19:52:20,738 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 19:52:20,738 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 19:52:21,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 19:52:21,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 19:52:21,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 19:52:21,062 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 19:52:21,065 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 19:52:21,065 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-opt-symm.wvr.bpl [2021-06-12 19:52:21,066 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-opt-symm.wvr.bpl' [2021-06-12 19:52:21,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 19:52:21,111 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 19:52:21,112 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 19:52:21,113 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 19:52:21,113 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 19:52:21,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:52:21" (1/1) ... [2021-06-12 19:52:21,133 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:52:21" (1/1) ... [2021-06-12 19:52:21,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 19:52:21,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 19:52:21,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 19:52:21,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 19:52:21,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:52:21" (1/1) ... [2021-06-12 19:52:21,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:52:21" (1/1) ... [2021-06-12 19:52:21,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:52:21" (1/1) ... [2021-06-12 19:52:21,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:52:21" (1/1) ... [2021-06-12 19:52:21,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:52:21" (1/1) ... [2021-06-12 19:52:21,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:52:21" (1/1) ... [2021-06-12 19:52:21,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:52:21" (1/1) ... [2021-06-12 19:52:21,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 19:52:21,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 19:52:21,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 19:52:21,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 19:52:21,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:52:21" (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 [2021-06-12 19:52:21,252 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 19:52:21,253 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 19:52:21,253 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 19:52:21,254 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 19:52:21,254 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 19:52:21,254 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 19:52:21,254 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 19:52:21,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 19:52:21,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 19:52:21,255 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 19:52:21,635 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 19:52:21,636 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-12 19:52:21,637 INFO L202 PluginConnector]: Adding new model chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 07:52:21 BoogieIcfgContainer [2021-06-12 19:52:21,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 19:52:21,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 19:52:21,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 19:52:21,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 19:52:21,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:52:21" (1/2) ... [2021-06-12 19:52:21,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2242d560 and model type chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 07:52:21, skipping insertion in model container [2021-06-12 19:52:21,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 07:52:21" (2/2) ... [2021-06-12 19:52:21,644 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-opt-symm.wvr.bpl [2021-06-12 19:52:21,649 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 19:52:21,649 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 19:52:21,649 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 19:52:21,650 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 19:52:21,680 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-12 19:52:21,703 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 19:52:21,718 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 19:52:21,718 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 19:52:21,718 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 19:52:21,718 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 19:52:21,718 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 19:52:21,718 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 19:52:21,719 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 19:52:21,719 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 19:52:21,726 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2021-06-12 19:52:21,744 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:21,746 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:21,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 19:52:21,751 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:21,751 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:21,752 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:21,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:21,756 INFO L82 PathProgramCache]: Analyzing trace with hash -715556201, now seen corresponding path program 1 times [2021-06-12 19:52:21,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:21,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521935402] [2021-06-12 19:52:21,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:21,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:21,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521935402] [2021-06-12 19:52:21,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521935402] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:52:21,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:52:21,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 19:52:21,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034292049] [2021-06-12 19:52:21,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:52:21,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:21,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:52:21,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:52:21,971 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 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 3.0) internal successors, (12), 4 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) [2021-06-12 19:52:22,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:22,017 INFO L93 Difference]: Finished difference Result 31 states and 58 transitions. [2021-06-12 19:52:22,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:52:22,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2021-06-12 19:52:22,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:22,026 INFO L225 Difference]: With dead ends: 31 [2021-06-12 19:52:22,027 INFO L226 Difference]: Without dead ends: 31 [2021-06-12 19:52:22,029 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:52:22,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-06-12 19:52:22,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-06-12 19:52:22,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:22,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 58 transitions. [2021-06-12 19:52:22,064 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 58 transitions. Word has length 12 [2021-06-12 19:52:22,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:22,064 INFO L482 AbstractCegarLoop]: Abstraction has 31 states and 58 transitions. [2021-06-12 19:52:22,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2021-06-12 19:52:22,065 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 58 transitions. [2021-06-12 19:52:22,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 19:52:22,066 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:22,066 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:22,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 19:52:22,067 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:22,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:22,070 INFO L82 PathProgramCache]: Analyzing trace with hash -434812415, now seen corresponding path program 2 times [2021-06-12 19:52:22,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:22,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066336354] [2021-06-12 19:52:22,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:22,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:22,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066336354] [2021-06-12 19:52:22,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066336354] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:52:22,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:52:22,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 19:52:22,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218269345] [2021-06-12 19:52:22,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:52:22,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:22,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:52:22,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:52:22,130 INFO L87 Difference]: Start difference. First operand 31 states and 58 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2021-06-12 19:52:22,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:22,169 INFO L93 Difference]: Finished difference Result 35 states and 66 transitions. [2021-06-12 19:52:22,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:52:22,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2021-06-12 19:52:22,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:22,175 INFO L225 Difference]: With dead ends: 35 [2021-06-12 19:52:22,176 INFO L226 Difference]: Without dead ends: 35 [2021-06-12 19:52:22,176 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:52:22,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-06-12 19:52:22,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-06-12 19:52:22,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:22,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 66 transitions. [2021-06-12 19:52:22,182 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 66 transitions. Word has length 12 [2021-06-12 19:52:22,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:22,182 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 66 transitions. [2021-06-12 19:52:22,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2021-06-12 19:52:22,182 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 66 transitions. [2021-06-12 19:52:22,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:52:22,183 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:22,183 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:22,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 19:52:22,183 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:22,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:22,183 INFO L82 PathProgramCache]: Analyzing trace with hash 114514857, now seen corresponding path program 1 times [2021-06-12 19:52:22,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:22,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129015096] [2021-06-12 19:52:22,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:22,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:22,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129015096] [2021-06-12 19:52:22,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129015096] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:52:22,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:52:22,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:52:22,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647756715] [2021-06-12 19:52:22,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:52:22,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:22,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:52:22,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:52:22,278 INFO L87 Difference]: Start difference. First operand 35 states and 66 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) [2021-06-12 19:52:22,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:22,317 INFO L93 Difference]: Finished difference Result 56 states and 103 transitions. [2021-06-12 19:52:22,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:52:22,318 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 [2021-06-12 19:52:22,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:22,319 INFO L225 Difference]: With dead ends: 56 [2021-06-12 19:52:22,319 INFO L226 Difference]: Without dead ends: 54 [2021-06-12 19:52:22,320 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:52:22,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-06-12 19:52:22,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2021-06-12 19:52:22,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:22,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 68 transitions. [2021-06-12 19:52:22,325 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 68 transitions. Word has length 13 [2021-06-12 19:52:22,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:22,326 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 68 transitions. [2021-06-12 19:52:22,326 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) [2021-06-12 19:52:22,326 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 68 transitions. [2021-06-12 19:52:22,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:52:22,327 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:22,327 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:22,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 19:52:22,327 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:22,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:22,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1879146489, now seen corresponding path program 2 times [2021-06-12 19:52:22,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:22,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000629573] [2021-06-12 19:52:22,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:22,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:22,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000629573] [2021-06-12 19:52:22,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000629573] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:52:22,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:52:22,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:52:22,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554119784] [2021-06-12 19:52:22,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:52:22,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:22,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:52:22,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:52:22,391 INFO L87 Difference]: Start difference. First operand 36 states and 68 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) [2021-06-12 19:52:22,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:22,461 INFO L93 Difference]: Finished difference Result 52 states and 97 transitions. [2021-06-12 19:52:22,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:52:22,462 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 [2021-06-12 19:52:22,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:22,463 INFO L225 Difference]: With dead ends: 52 [2021-06-12 19:52:22,463 INFO L226 Difference]: Without dead ends: 52 [2021-06-12 19:52:22,463 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:52:22,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-06-12 19:52:22,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2021-06-12 19:52:22,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:22,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 70 transitions. [2021-06-12 19:52:22,467 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 70 transitions. Word has length 13 [2021-06-12 19:52:22,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:22,468 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 70 transitions. [2021-06-12 19:52:22,468 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) [2021-06-12 19:52:22,468 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 70 transitions. [2021-06-12 19:52:22,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:52:22,468 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:22,469 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:22,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 19:52:22,469 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:22,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:22,469 INFO L82 PathProgramCache]: Analyzing trace with hash -544555159, now seen corresponding path program 3 times [2021-06-12 19:52:22,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:22,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204911110] [2021-06-12 19:52:22,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:22,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:22,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:22,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204911110] [2021-06-12 19:52:22,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204911110] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:52:22,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:52:22,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:52:22,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166356143] [2021-06-12 19:52:22,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:52:22,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:22,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:52:22,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:52:22,523 INFO L87 Difference]: Start difference. First operand 37 states and 70 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) [2021-06-12 19:52:22,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:22,585 INFO L93 Difference]: Finished difference Result 41 states and 78 transitions. [2021-06-12 19:52:22,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:52:22,586 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 [2021-06-12 19:52:22,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:22,587 INFO L225 Difference]: With dead ends: 41 [2021-06-12 19:52:22,587 INFO L226 Difference]: Without dead ends: 41 [2021-06-12 19:52:22,587 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:52:22,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-06-12 19:52:22,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2021-06-12 19:52:22,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:22,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 70 transitions. [2021-06-12 19:52:22,592 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 70 transitions. Word has length 13 [2021-06-12 19:52:22,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:22,592 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 70 transitions. [2021-06-12 19:52:22,592 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) [2021-06-12 19:52:22,593 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 70 transitions. [2021-06-12 19:52:22,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:52:22,593 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:22,593 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:22,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 19:52:22,594 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:22,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:22,594 INFO L82 PathProgramCache]: Analyzing trace with hash 434832868, now seen corresponding path program 1 times [2021-06-12 19:52:22,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:22,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461342255] [2021-06-12 19:52:22,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:52:22,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:22,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461342255] [2021-06-12 19:52:22,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461342255] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:52:22,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:52:22,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 19:52:22,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943082766] [2021-06-12 19:52:22,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:52:22,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:22,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:52:22,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:52:22,644 INFO L87 Difference]: Start difference. First operand 37 states and 70 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2021-06-12 19:52:22,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:22,660 INFO L93 Difference]: Finished difference Result 63 states and 115 transitions. [2021-06-12 19:52:22,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:52:22,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2021-06-12 19:52:22,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:22,662 INFO L225 Difference]: With dead ends: 63 [2021-06-12 19:52:22,662 INFO L226 Difference]: Without dead ends: 63 [2021-06-12 19:52:22,663 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:52:22,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-12 19:52:22,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2021-06-12 19:52:22,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:22,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 76 transitions. [2021-06-12 19:52:22,678 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 76 transitions. Word has length 13 [2021-06-12 19:52:22,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:22,678 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 76 transitions. [2021-06-12 19:52:22,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2021-06-12 19:52:22,679 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 76 transitions. [2021-06-12 19:52:22,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:52:22,682 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:22,682 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:22,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 19:52:22,689 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:22,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:22,689 INFO L82 PathProgramCache]: Analyzing trace with hash 373288736, now seen corresponding path program 2 times [2021-06-12 19:52:22,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:22,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456253836] [2021-06-12 19:52:22,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:22,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:52:22,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:22,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456253836] [2021-06-12 19:52:22,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456253836] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:52:22,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:52:22,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 19:52:22,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396455215] [2021-06-12 19:52:22,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:52:22,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:22,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:52:22,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:52:22,734 INFO L87 Difference]: Start difference. First operand 39 states and 76 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2021-06-12 19:52:22,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:22,763 INFO L93 Difference]: Finished difference Result 44 states and 81 transitions. [2021-06-12 19:52:22,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:52:22,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2021-06-12 19:52:22,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:22,766 INFO L225 Difference]: With dead ends: 44 [2021-06-12 19:52:22,766 INFO L226 Difference]: Without dead ends: 39 [2021-06-12 19:52:22,766 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:52:22,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-12 19:52:22,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-06-12 19:52:22,776 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) [2021-06-12 19:52:22,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-06-12 19:52:22,777 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-06-12 19:52:22,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:22,777 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-06-12 19:52:22,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2021-06-12 19:52:22,777 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-06-12 19:52:22,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:52:22,781 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:22,781 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:22,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 19:52:22,781 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:22,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:22,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1182521280, now seen corresponding path program 1 times [2021-06-12 19:52:22,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:22,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296889822] [2021-06-12 19:52:22,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:23,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:23,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:23,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296889822] [2021-06-12 19:52:23,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296889822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:23,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271861202] [2021-06-12 19:52:23,110 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 [2021-06-12 19:52:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:23,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:52:23,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:23,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271861202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:23,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:23,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 19:52:23,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036109987] [2021-06-12 19:52:23,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:23,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:23,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:23,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:23,613 INFO L87 Difference]: Start difference. First operand 39 states and 74 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) [2021-06-12 19:52:24,006 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2021-06-12 19:52:24,175 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2021-06-12 19:52:24,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:24,206 INFO L93 Difference]: Finished difference Result 71 states and 127 transitions. [2021-06-12 19:52:24,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:52:24,206 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 14 [2021-06-12 19:52:24,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:24,207 INFO L225 Difference]: With dead ends: 71 [2021-06-12 19:52:24,207 INFO L226 Difference]: Without dead ends: 58 [2021-06-12 19:52:24,207 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 820.1ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:52:24,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-12 19:52:24,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2021-06-12 19:52:24,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:24,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2021-06-12 19:52:24,210 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 14 [2021-06-12 19:52:24,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:24,210 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2021-06-12 19:52:24,210 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) [2021-06-12 19:52:24,210 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2021-06-12 19:52:24,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:52:24,210 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:24,211 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:24,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-06-12 19:52:24,421 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:24,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:24,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1118784670, now seen corresponding path program 2 times [2021-06-12 19:52:24,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:24,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441971065] [2021-06-12 19:52:24,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:24,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:24,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:24,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:24,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441971065] [2021-06-12 19:52:24,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441971065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:24,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975620830] [2021-06-12 19:52:24,684 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 [2021-06-12 19:52:24,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:24,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:24,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:52:24,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:25,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975620830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:25,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:25,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 19:52:25,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917019257] [2021-06-12 19:52:25,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:25,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:25,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:25,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:25,070 INFO L87 Difference]: Start difference. First operand 40 states and 76 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) [2021-06-12 19:52:25,482 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2021-06-12 19:52:25,811 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-06-12 19:52:26,152 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-06-12 19:52:26,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:26,495 INFO L93 Difference]: Finished difference Result 101 states and 176 transitions. [2021-06-12 19:52:26,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:52:26,497 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 14 [2021-06-12 19:52:26,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:26,498 INFO L225 Difference]: With dead ends: 101 [2021-06-12 19:52:26,498 INFO L226 Difference]: Without dead ends: 80 [2021-06-12 19:52:26,498 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1625.3ms TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:52:26,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-12 19:52:26,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 44. [2021-06-12 19:52:26,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:26,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 86 transitions. [2021-06-12 19:52:26,501 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 86 transitions. Word has length 14 [2021-06-12 19:52:26,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:26,501 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 86 transitions. [2021-06-12 19:52:26,502 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) [2021-06-12 19:52:26,502 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 86 transitions. [2021-06-12 19:52:26,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:52:26,502 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:26,502 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:26,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-12 19:52:26,725 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:26,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:26,725 INFO L82 PathProgramCache]: Analyzing trace with hash 531039348, now seen corresponding path program 3 times [2021-06-12 19:52:26,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:26,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975799422] [2021-06-12 19:52:26,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:26,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:26,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:26,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975799422] [2021-06-12 19:52:26,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975799422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:26,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013065593] [2021-06-12 19:52:26,895 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 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 [2021-06-12 19:52:26,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:52:26,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:26,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:52:26,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:27,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:27,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013065593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:27,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:27,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 19:52:27,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99760555] [2021-06-12 19:52:27,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:27,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:27,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:27,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:27,226 INFO L87 Difference]: Start difference. First operand 44 states and 86 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) [2021-06-12 19:52:27,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:27,616 INFO L93 Difference]: Finished difference Result 68 states and 131 transitions. [2021-06-12 19:52:27,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:52:27,617 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 14 [2021-06-12 19:52:27,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:27,617 INFO L225 Difference]: With dead ends: 68 [2021-06-12 19:52:27,617 INFO L226 Difference]: Without dead ends: 57 [2021-06-12 19:52:27,618 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 538.4ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:52:27,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-06-12 19:52:27,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2021-06-12 19:52:27,620 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) [2021-06-12 19:52:27,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-06-12 19:52:27,620 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 14 [2021-06-12 19:52:27,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:27,621 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-06-12 19:52:27,621 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) [2021-06-12 19:52:27,621 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-06-12 19:52:27,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:52:27,621 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:27,621 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:27,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-12 19:52:27,841 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:27,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:27,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1865630678, now seen corresponding path program 4 times [2021-06-12 19:52:27,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:27,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629154733] [2021-06-12 19:52:27,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:28,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:28,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629154733] [2021-06-12 19:52:28,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629154733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:28,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804101339] [2021-06-12 19:52:28,030 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 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 [2021-06-12 19:52:28,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:52:28,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:28,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:52:28,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:28,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804101339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:28,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:28,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 19:52:28,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523163649] [2021-06-12 19:52:28,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:52:28,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:28,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:52:28,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:52:28,348 INFO L87 Difference]: Start difference. First operand 46 states and 90 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) [2021-06-12 19:52:28,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:28,849 INFO L93 Difference]: Finished difference Result 99 states and 177 transitions. [2021-06-12 19:52:28,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:52:28,849 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 [2021-06-12 19:52:28,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:28,850 INFO L225 Difference]: With dead ends: 99 [2021-06-12 19:52:28,850 INFO L226 Difference]: Without dead ends: 80 [2021-06-12 19:52:28,851 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 683.0ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:52:28,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-12 19:52:28,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 48. [2021-06-12 19:52:28,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 47 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) [2021-06-12 19:52:28,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 96 transitions. [2021-06-12 19:52:28,853 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 96 transitions. Word has length 14 [2021-06-12 19:52:28,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:28,854 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 96 transitions. [2021-06-12 19:52:28,854 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) [2021-06-12 19:52:28,854 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 96 transitions. [2021-06-12 19:52:28,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:52:28,854 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:28,854 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:29,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 19:52:29,065 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:29,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:29,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1327775100, now seen corresponding path program 5 times [2021-06-12 19:52:29,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:29,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158155435] [2021-06-12 19:52:29,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:29,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:29,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:29,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158155435] [2021-06-12 19:52:29,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158155435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:29,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201817981] [2021-06-12 19:52:29,213 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 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 [2021-06-12 19:52:29,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:52:29,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:29,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:52:29,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:29,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:29,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201817981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:29,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:29,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 19:52:29,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180947492] [2021-06-12 19:52:29,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:52:29,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:29,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:52:29,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:52:29,450 INFO L87 Difference]: Start difference. First operand 48 states and 96 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) [2021-06-12 19:52:30,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:30,067 INFO L93 Difference]: Finished difference Result 110 states and 208 transitions. [2021-06-12 19:52:30,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:52:30,070 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 [2021-06-12 19:52:30,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:30,071 INFO L225 Difference]: With dead ends: 110 [2021-06-12 19:52:30,071 INFO L226 Difference]: Without dead ends: 84 [2021-06-12 19:52:30,071 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 691.3ms TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:52:30,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-12 19:52:30,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2021-06-12 19:52:30,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 53 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) [2021-06-12 19:52:30,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 110 transitions. [2021-06-12 19:52:30,085 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 110 transitions. Word has length 14 [2021-06-12 19:52:30,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:30,086 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 110 transitions. [2021-06-12 19:52:30,086 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) [2021-06-12 19:52:30,086 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 110 transitions. [2021-06-12 19:52:30,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:52:30,086 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:30,086 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:30,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-12 19:52:30,303 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:30,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:30,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1416837628, now seen corresponding path program 6 times [2021-06-12 19:52:30,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:30,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803800652] [2021-06-12 19:52:30,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:30,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:30,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803800652] [2021-06-12 19:52:30,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803800652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:30,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203607586] [2021-06-12 19:52:30,475 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 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 [2021-06-12 19:52:30,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:52:30,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:30,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:52:30,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:30,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203607586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:30,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:30,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 19:52:30,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032402036] [2021-06-12 19:52:30,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:30,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:30,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:30,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:30,796 INFO L87 Difference]: Start difference. First operand 54 states and 110 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) [2021-06-12 19:52:31,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:31,144 INFO L93 Difference]: Finished difference Result 97 states and 182 transitions. [2021-06-12 19:52:31,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:52:31,144 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 14 [2021-06-12 19:52:31,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:31,145 INFO L225 Difference]: With dead ends: 97 [2021-06-12 19:52:31,145 INFO L226 Difference]: Without dead ends: 79 [2021-06-12 19:52:31,145 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 539.4ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:52:31,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-12 19:52:31,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 56. [2021-06-12 19:52:31,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 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) [2021-06-12 19:52:31,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 115 transitions. [2021-06-12 19:52:31,148 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 115 transitions. Word has length 14 [2021-06-12 19:52:31,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:31,148 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 115 transitions. [2021-06-12 19:52:31,148 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) [2021-06-12 19:52:31,149 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 115 transitions. [2021-06-12 19:52:31,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:52:31,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:31,149 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:31,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:31,353 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:31,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:31,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1543538338, now seen corresponding path program 7 times [2021-06-12 19:52:31,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:31,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804354160] [2021-06-12 19:52:31,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:31,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:31,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804354160] [2021-06-12 19:52:31,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804354160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:31,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784266328] [2021-06-12 19:52:31,495 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 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 [2021-06-12 19:52:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:31,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:52:31,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:31,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:31,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784266328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:31,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:31,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 19:52:31,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192955798] [2021-06-12 19:52:31,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:52:31,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:31,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:52:31,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:52:31,764 INFO L87 Difference]: Start difference. First operand 56 states and 115 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) [2021-06-12 19:52:31,995 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-06-12 19:52:32,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:32,166 INFO L93 Difference]: Finished difference Result 115 states and 207 transitions. [2021-06-12 19:52:32,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:52:32,166 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 [2021-06-12 19:52:32,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:32,167 INFO L225 Difference]: With dead ends: 115 [2021-06-12 19:52:32,167 INFO L226 Difference]: Without dead ends: 89 [2021-06-12 19:52:32,167 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 569.9ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:52:32,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-12 19:52:32,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2021-06-12 19:52:32,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 56 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) [2021-06-12 19:52:32,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 117 transitions. [2021-06-12 19:52:32,169 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 117 transitions. Word has length 14 [2021-06-12 19:52:32,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:32,170 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 117 transitions. [2021-06-12 19:52:32,170 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) [2021-06-12 19:52:32,170 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 117 transitions. [2021-06-12 19:52:32,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:52:32,170 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:32,170 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:32,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-12 19:52:32,389 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:32,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:32,389 INFO L82 PathProgramCache]: Analyzing trace with hash -2081393916, now seen corresponding path program 8 times [2021-06-12 19:52:32,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:32,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483746895] [2021-06-12 19:52:32,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:32,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:32,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483746895] [2021-06-12 19:52:32,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483746895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:32,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237886357] [2021-06-12 19:52:32,488 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 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 [2021-06-12 19:52:32,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:32,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:32,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:52:32,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:32,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237886357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:32,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:32,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 19:52:32,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486117359] [2021-06-12 19:52:32,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:52:32,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:32,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:52:32,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:52:32,812 INFO L87 Difference]: Start difference. First operand 57 states and 117 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) [2021-06-12 19:52:33,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:33,147 INFO L93 Difference]: Finished difference Result 115 states and 215 transitions. [2021-06-12 19:52:33,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:52:33,148 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 [2021-06-12 19:52:33,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:33,148 INFO L225 Difference]: With dead ends: 115 [2021-06-12 19:52:33,148 INFO L226 Difference]: Without dead ends: 89 [2021-06-12 19:52:33,149 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 456.2ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:52:33,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-12 19:52:33,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 60. [2021-06-12 19:52:33,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 59 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) [2021-06-12 19:52:33,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 125 transitions. [2021-06-12 19:52:33,151 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 125 transitions. Word has length 14 [2021-06-12 19:52:33,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:33,152 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 125 transitions. [2021-06-12 19:52:33,152 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) [2021-06-12 19:52:33,152 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 125 transitions. [2021-06-12 19:52:33,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:52:33,152 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:33,152 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:33,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-12 19:52:33,361 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:33,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:33,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1119481792, now seen corresponding path program 9 times [2021-06-12 19:52:33,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:33,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051238876] [2021-06-12 19:52:33,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:33,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:33,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051238876] [2021-06-12 19:52:33,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051238876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:33,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208373115] [2021-06-12 19:52:33,502 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 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 [2021-06-12 19:52:33,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:52:33,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:33,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:52:33,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:33,679 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-06-12 19:52:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:33,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208373115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:33,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:33,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 19:52:33,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835766515] [2021-06-12 19:52:33,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:52:33,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:33,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:52:33,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:52:33,881 INFO L87 Difference]: Start difference. First operand 60 states and 125 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) [2021-06-12 19:52:34,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:34,780 INFO L93 Difference]: Finished difference Result 142 states and 277 transitions. [2021-06-12 19:52:34,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:52:34,780 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 [2021-06-12 19:52:34,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:34,781 INFO L225 Difference]: With dead ends: 142 [2021-06-12 19:52:34,781 INFO L226 Difference]: Without dead ends: 123 [2021-06-12 19:52:34,781 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1093.3ms TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:52:34,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-12 19:52:34,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2021-06-12 19:52:34,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.1449275362318843) internal successors, (148), 69 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) [2021-06-12 19:52:34,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 148 transitions. [2021-06-12 19:52:34,784 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 148 transitions. Word has length 14 [2021-06-12 19:52:34,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:34,784 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 148 transitions. [2021-06-12 19:52:34,785 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) [2021-06-12 19:52:34,785 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 148 transitions. [2021-06-12 19:52:34,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:34,785 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:34,785 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:34,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:34,993 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:34,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:34,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1559031433, now seen corresponding path program 10 times [2021-06-12 19:52:34,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:34,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276522947] [2021-06-12 19:52:34,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:35,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:35,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276522947] [2021-06-12 19:52:35,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276522947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:35,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264339182] [2021-06-12 19:52:35,055 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 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 [2021-06-12 19:52:35,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:52:35,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:35,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:52:35,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:35,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264339182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:35,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:35,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 19:52:35,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739504083] [2021-06-12 19:52:35,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:52:35,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:35,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:52:35,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:52:35,144 INFO L87 Difference]: Start difference. First operand 70 states and 148 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2021-06-12 19:52:35,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:35,204 INFO L93 Difference]: Finished difference Result 102 states and 207 transitions. [2021-06-12 19:52:35,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:52:35,204 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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 15 [2021-06-12 19:52:35,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:35,205 INFO L225 Difference]: With dead ends: 102 [2021-06-12 19:52:35,205 INFO L226 Difference]: Without dead ends: 102 [2021-06-12 19:52:35,205 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:52:35,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-12 19:52:35,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2021-06-12 19:52:35,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.157142857142857) internal successors, (151), 70 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) [2021-06-12 19:52:35,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 151 transitions. [2021-06-12 19:52:35,208 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 151 transitions. Word has length 15 [2021-06-12 19:52:35,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:35,208 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 151 transitions. [2021-06-12 19:52:35,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2021-06-12 19:52:35,209 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 151 transitions. [2021-06-12 19:52:35,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:35,209 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:35,209 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:35,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 19:52:35,421 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:35,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:35,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1022375235, now seen corresponding path program 11 times [2021-06-12 19:52:35,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:35,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184326333] [2021-06-12 19:52:35,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:35,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:35,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184326333] [2021-06-12 19:52:35,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184326333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:35,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827832001] [2021-06-12 19:52:35,493 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 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 [2021-06-12 19:52:35,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:35,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:35,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:52:35,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:35,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827832001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:35,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:35,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:52:35,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086073393] [2021-06-12 19:52:35,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:52:35,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:35,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:52:35,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:52:35,626 INFO L87 Difference]: Start difference. First operand 71 states and 151 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) [2021-06-12 19:52:35,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:35,883 INFO L93 Difference]: Finished difference Result 111 states and 225 transitions. [2021-06-12 19:52:35,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:52:35,884 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 [2021-06-12 19:52:35,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:35,884 INFO L225 Difference]: With dead ends: 111 [2021-06-12 19:52:35,884 INFO L226 Difference]: Without dead ends: 111 [2021-06-12 19:52:35,884 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 281.6ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:52:35,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-12 19:52:35,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2021-06-12 19:52:35,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.157142857142857) internal successors, (151), 70 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) [2021-06-12 19:52:35,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 151 transitions. [2021-06-12 19:52:35,887 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 151 transitions. Word has length 15 [2021-06-12 19:52:35,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:35,887 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 151 transitions. [2021-06-12 19:52:35,888 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) [2021-06-12 19:52:35,888 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 151 transitions. [2021-06-12 19:52:35,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:35,888 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:35,888 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:36,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:36,111 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:36,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:36,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1144507010, now seen corresponding path program 12 times [2021-06-12 19:52:36,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:36,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673112683] [2021-06-12 19:52:36,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:36,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:36,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:36,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673112683] [2021-06-12 19:52:36,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673112683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:36,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35676557] [2021-06-12 19:52:36,183 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 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 [2021-06-12 19:52:36,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:52:36,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:36,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:52:36,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:36,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35676557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:36,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:36,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:52:36,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878384368] [2021-06-12 19:52:36,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:52:36,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:36,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:52:36,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:52:36,396 INFO L87 Difference]: Start difference. First operand 71 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) [2021-06-12 19:52:36,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:36,921 INFO L93 Difference]: Finished difference Result 131 states and 251 transitions. [2021-06-12 19:52:36,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:52:36,922 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 [2021-06-12 19:52:36,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:36,922 INFO L225 Difference]: With dead ends: 131 [2021-06-12 19:52:36,922 INFO L226 Difference]: Without dead ends: 127 [2021-06-12 19:52:36,923 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 611.3ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:52:36,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-12 19:52:36,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 79. [2021-06-12 19:52:36,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1666666666666665) internal successors, (169), 78 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) [2021-06-12 19:52:36,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 169 transitions. [2021-06-12 19:52:36,926 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 169 transitions. Word has length 15 [2021-06-12 19:52:36,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:36,926 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 169 transitions. [2021-06-12 19:52:36,926 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) [2021-06-12 19:52:36,926 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 169 transitions. [2021-06-12 19:52:36,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:36,927 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:36,927 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:37,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:37,137 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:37,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:37,137 INFO L82 PathProgramCache]: Analyzing trace with hash -225639483, now seen corresponding path program 13 times [2021-06-12 19:52:37,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:37,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534246845] [2021-06-12 19:52:37,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:37,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:37,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534246845] [2021-06-12 19:52:37,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534246845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:37,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082901250] [2021-06-12 19:52:37,207 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 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 [2021-06-12 19:52:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:37,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:52:37,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:37,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:37,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082901250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:37,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:37,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:52:37,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054433257] [2021-06-12 19:52:37,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:52:37,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:37,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:52:37,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:52:37,371 INFO L87 Difference]: Start difference. First operand 79 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:37,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:37,626 INFO L93 Difference]: Finished difference Result 141 states and 275 transitions. [2021-06-12 19:52:37,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:52:37,626 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 15 [2021-06-12 19:52:37,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:37,627 INFO L225 Difference]: With dead ends: 141 [2021-06-12 19:52:37,627 INFO L226 Difference]: Without dead ends: 141 [2021-06-12 19:52:37,627 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 260.9ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:52:37,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-12 19:52:37,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 79. [2021-06-12 19:52:37,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1666666666666665) internal successors, (169), 78 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) [2021-06-12 19:52:37,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 169 transitions. [2021-06-12 19:52:37,631 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 169 transitions. Word has length 15 [2021-06-12 19:52:37,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:37,631 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 169 transitions. [2021-06-12 19:52:37,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:37,632 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 169 transitions. [2021-06-12 19:52:37,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:37,632 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:37,632 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:37,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-12 19:52:37,841 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:37,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:37,841 INFO L82 PathProgramCache]: Analyzing trace with hash -432834720, now seen corresponding path program 14 times [2021-06-12 19:52:37,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:37,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198145645] [2021-06-12 19:52:37,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:37,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:37,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198145645] [2021-06-12 19:52:37,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198145645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:37,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216797895] [2021-06-12 19:52:37,900 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 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 [2021-06-12 19:52:37,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:37,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:37,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:52:37,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:38,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216797895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:38,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:38,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:52:38,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648577143] [2021-06-12 19:52:38,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:52:38,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:38,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:52:38,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:52:38,088 INFO L87 Difference]: Start difference. First operand 79 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:38,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:38,273 INFO L93 Difference]: Finished difference Result 116 states and 229 transitions. [2021-06-12 19:52:38,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:52:38,274 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 15 [2021-06-12 19:52:38,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:38,274 INFO L225 Difference]: With dead ends: 116 [2021-06-12 19:52:38,274 INFO L226 Difference]: Without dead ends: 114 [2021-06-12 19:52:38,275 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 268.9ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:38,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-12 19:52:38,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 75. [2021-06-12 19:52:38,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.1621621621621623) internal successors, (160), 74 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) [2021-06-12 19:52:38,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 160 transitions. [2021-06-12 19:52:38,277 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 160 transitions. Word has length 15 [2021-06-12 19:52:38,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:38,277 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 160 transitions. [2021-06-12 19:52:38,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:38,278 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 160 transitions. [2021-06-12 19:52:38,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:38,278 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:38,278 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:38,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:38,489 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:38,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:38,489 INFO L82 PathProgramCache]: Analyzing trace with hash 250671963, now seen corresponding path program 15 times [2021-06-12 19:52:38,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:38,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99064005] [2021-06-12 19:52:38,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:38,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:38,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:38,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99064005] [2021-06-12 19:52:38,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99064005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:38,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419518999] [2021-06-12 19:52:38,545 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 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 [2021-06-12 19:52:38,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:52:38,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:38,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:52:38,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:38,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419518999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:38,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:38,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:52:38,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300698156] [2021-06-12 19:52:38,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:52:38,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:38,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:52:38,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:52:38,686 INFO L87 Difference]: Start difference. First operand 75 states and 160 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:38,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:38,813 INFO L93 Difference]: Finished difference Result 107 states and 215 transitions. [2021-06-12 19:52:38,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:52:38,813 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 15 [2021-06-12 19:52:38,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:38,814 INFO L225 Difference]: With dead ends: 107 [2021-06-12 19:52:38,814 INFO L226 Difference]: Without dead ends: 104 [2021-06-12 19:52:38,814 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 155.9ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:38,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-12 19:52:38,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 75. [2021-06-12 19:52:38,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.1486486486486487) internal successors, (159), 74 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) [2021-06-12 19:52:38,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 159 transitions. [2021-06-12 19:52:38,817 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 159 transitions. Word has length 15 [2021-06-12 19:52:38,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:38,817 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 159 transitions. [2021-06-12 19:52:38,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:38,817 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 159 transitions. [2021-06-12 19:52:38,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:38,817 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:38,818 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:39,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:39,021 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:39,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:39,021 INFO L82 PathProgramCache]: Analyzing trace with hash 901756610, now seen corresponding path program 16 times [2021-06-12 19:52:39,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:39,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022880752] [2021-06-12 19:52:39,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:39,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:39,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022880752] [2021-06-12 19:52:39,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022880752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:39,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870713879] [2021-06-12 19:52:39,091 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 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 [2021-06-12 19:52:39,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:52:39,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:39,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:52:39,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:39,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870713879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:39,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:39,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:52:39,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503425032] [2021-06-12 19:52:39,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:52:39,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:39,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:52:39,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:52:39,249 INFO L87 Difference]: Start difference. First operand 75 states and 159 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:39,386 INFO L93 Difference]: Finished difference Result 100 states and 204 transitions. [2021-06-12 19:52:39,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:52:39,387 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 15 [2021-06-12 19:52:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:39,388 INFO L225 Difference]: With dead ends: 100 [2021-06-12 19:52:39,388 INFO L226 Difference]: Without dead ends: 100 [2021-06-12 19:52:39,388 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 219.6ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:52:39,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-12 19:52:39,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 72. [2021-06-12 19:52:39,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.140845070422535) internal successors, (152), 71 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) [2021-06-12 19:52:39,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 152 transitions. [2021-06-12 19:52:39,390 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 152 transitions. Word has length 15 [2021-06-12 19:52:39,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:39,390 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 152 transitions. [2021-06-12 19:52:39,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:39,390 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 152 transitions. [2021-06-12 19:52:39,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:39,391 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:39,391 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:39,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:39,597 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:39,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:39,597 INFO L82 PathProgramCache]: Analyzing trace with hash -2062611033, now seen corresponding path program 17 times [2021-06-12 19:52:39,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:39,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626052099] [2021-06-12 19:52:39,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:39,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:39,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626052099] [2021-06-12 19:52:39,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626052099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:39,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017563505] [2021-06-12 19:52:39,657 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 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 [2021-06-12 19:52:39,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:39,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:39,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:52:39,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:39,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017563505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:39,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:39,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:52:39,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029831942] [2021-06-12 19:52:39,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:52:39,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:39,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:52:39,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:52:39,771 INFO L87 Difference]: Start difference. First operand 72 states and 152 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) [2021-06-12 19:52:39,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:39,877 INFO L93 Difference]: Finished difference Result 82 states and 172 transitions. [2021-06-12 19:52:39,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:52:39,878 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 [2021-06-12 19:52:39,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:39,878 INFO L225 Difference]: With dead ends: 82 [2021-06-12 19:52:39,878 INFO L226 Difference]: Without dead ends: 82 [2021-06-12 19:52:39,878 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:52:39,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-12 19:52:39,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-06-12 19:52:39,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.140845070422535) internal successors, (152), 71 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) [2021-06-12 19:52:39,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 152 transitions. [2021-06-12 19:52:39,881 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 152 transitions. Word has length 15 [2021-06-12 19:52:39,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:39,881 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 152 transitions. [2021-06-12 19:52:39,881 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) [2021-06-12 19:52:39,881 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 152 transitions. [2021-06-12 19:52:39,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:39,881 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:39,882 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:40,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:40,097 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:40,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:40,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1265875281, now seen corresponding path program 18 times [2021-06-12 19:52:40,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:40,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001021996] [2021-06-12 19:52:40,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:40,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:40,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001021996] [2021-06-12 19:52:40,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001021996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:40,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969821934] [2021-06-12 19:52:40,153 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 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 [2021-06-12 19:52:40,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:52:40,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:40,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:52:40,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:40,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:40,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969821934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:40,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:40,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:52:40,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335240478] [2021-06-12 19:52:40,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:52:40,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:40,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:52:40,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:52:40,255 INFO L87 Difference]: Start difference. First operand 72 states and 152 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:40,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:40,304 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2021-06-12 19:52:40,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:52:40,304 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 15 [2021-06-12 19:52:40,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:40,304 INFO L225 Difference]: With dead ends: 88 [2021-06-12 19:52:40,304 INFO L226 Difference]: Without dead ends: 88 [2021-06-12 19:52:40,305 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:52:40,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-12 19:52:40,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2021-06-12 19:52:40,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.140845070422535) internal successors, (152), 71 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) [2021-06-12 19:52:40,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 152 transitions. [2021-06-12 19:52:40,306 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 152 transitions. Word has length 15 [2021-06-12 19:52:40,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:40,307 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 152 transitions. [2021-06-12 19:52:40,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:40,307 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 152 transitions. [2021-06-12 19:52:40,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:40,307 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:40,307 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:40,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:40,521 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:40,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:40,521 INFO L82 PathProgramCache]: Analyzing trace with hash -978325046, now seen corresponding path program 19 times [2021-06-12 19:52:40,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:40,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564201173] [2021-06-12 19:52:40,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:40,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:40,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:40,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564201173] [2021-06-12 19:52:40,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564201173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:40,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483463721] [2021-06-12 19:52:40,574 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 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 [2021-06-12 19:52:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:40,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:52:40,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:40,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:40,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483463721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:40,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:40,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:52:40,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101827712] [2021-06-12 19:52:40,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:52:40,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:40,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:52:40,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:52:40,735 INFO L87 Difference]: Start difference. First operand 72 states and 152 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:40,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:40,785 INFO L93 Difference]: Finished difference Result 79 states and 164 transitions. [2021-06-12 19:52:40,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:52:40,785 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 15 [2021-06-12 19:52:40,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:40,786 INFO L225 Difference]: With dead ends: 79 [2021-06-12 19:52:40,786 INFO L226 Difference]: Without dead ends: 79 [2021-06-12 19:52:40,786 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:52:40,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-12 19:52:40,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-06-12 19:52:40,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 68 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) [2021-06-12 19:52:40,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 144 transitions. [2021-06-12 19:52:40,788 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 144 transitions. Word has length 15 [2021-06-12 19:52:40,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:40,789 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 144 transitions. [2021-06-12 19:52:40,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:40,789 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 144 transitions. [2021-06-12 19:52:40,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:40,789 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:40,789 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:40,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:40,990 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:40,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:40,990 INFO L82 PathProgramCache]: Analyzing trace with hash 367867078, now seen corresponding path program 20 times [2021-06-12 19:52:40,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:40,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981514123] [2021-06-12 19:52:40,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:41,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:41,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:41,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981514123] [2021-06-12 19:52:41,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981514123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:41,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989552668] [2021-06-12 19:52:41,053 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 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 [2021-06-12 19:52:41,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:41,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:41,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:52:41,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:41,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989552668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:41,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:41,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:52:41,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557531216] [2021-06-12 19:52:41,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:52:41,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:41,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:52:41,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:52:41,161 INFO L87 Difference]: Start difference. First operand 69 states and 144 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:41,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:41,316 INFO L93 Difference]: Finished difference Result 124 states and 235 transitions. [2021-06-12 19:52:41,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:52:41,316 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 15 [2021-06-12 19:52:41,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:41,317 INFO L225 Difference]: With dead ends: 124 [2021-06-12 19:52:41,317 INFO L226 Difference]: Without dead ends: 124 [2021-06-12 19:52:41,317 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 167.4ms TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:41,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-12 19:52:41,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 71. [2021-06-12 19:52:41,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.157142857142857) internal successors, (151), 70 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) [2021-06-12 19:52:41,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 151 transitions. [2021-06-12 19:52:41,320 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 151 transitions. Word has length 15 [2021-06-12 19:52:41,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:41,320 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 151 transitions. [2021-06-12 19:52:41,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:41,320 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 151 transitions. [2021-06-12 19:52:41,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:41,320 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:41,320 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:41,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-12 19:52:41,529 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:41,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:41,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1862953191, now seen corresponding path program 21 times [2021-06-12 19:52:41,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:41,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663908485] [2021-06-12 19:52:41,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:41,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:41,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:41,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663908485] [2021-06-12 19:52:41,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663908485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:41,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544400546] [2021-06-12 19:52:41,586 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 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 [2021-06-12 19:52:41,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:52:41,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:41,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:52:41,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:41,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:41,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544400546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:41,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:41,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:52:41,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711012218] [2021-06-12 19:52:41,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:52:41,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:41,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:52:41,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:52:41,753 INFO L87 Difference]: Start difference. First operand 71 states and 151 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:41,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:41,869 INFO L93 Difference]: Finished difference Result 114 states and 220 transitions. [2021-06-12 19:52:41,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:52:41,873 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 15 [2021-06-12 19:52:41,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:41,873 INFO L225 Difference]: With dead ends: 114 [2021-06-12 19:52:41,873 INFO L226 Difference]: Without dead ends: 108 [2021-06-12 19:52:41,874 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 184.9ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:52:41,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-12 19:52:41,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2021-06-12 19:52:41,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.1728395061728394) internal successors, (176), 81 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) [2021-06-12 19:52:41,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 176 transitions. [2021-06-12 19:52:41,877 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 176 transitions. Word has length 15 [2021-06-12 19:52:41,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:41,877 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 176 transitions. [2021-06-12 19:52:41,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:41,877 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 176 transitions. [2021-06-12 19:52:41,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:41,878 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:41,878 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:42,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-12 19:52:42,102 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:42,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:42,102 INFO L82 PathProgramCache]: Analyzing trace with hash -169988500, now seen corresponding path program 22 times [2021-06-12 19:52:42,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:42,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111960968] [2021-06-12 19:52:42,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:42,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:42,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:42,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111960968] [2021-06-12 19:52:42,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111960968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:42,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443928510] [2021-06-12 19:52:42,160 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 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 [2021-06-12 19:52:42,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:52:42,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:42,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:52:42,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:42,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443928510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:42,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:42,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:52:42,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396820080] [2021-06-12 19:52:42,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:52:42,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:42,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:52:42,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:52:42,270 INFO L87 Difference]: Start difference. First operand 82 states and 176 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:42,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:42,319 INFO L93 Difference]: Finished difference Result 96 states and 201 transitions. [2021-06-12 19:52:42,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:52:42,319 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 15 [2021-06-12 19:52:42,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:42,320 INFO L225 Difference]: With dead ends: 96 [2021-06-12 19:52:42,320 INFO L226 Difference]: Without dead ends: 96 [2021-06-12 19:52:42,321 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:52:42,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-12 19:52:42,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2021-06-12 19:52:42,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.15) internal successors, (172), 80 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) [2021-06-12 19:52:42,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 172 transitions. [2021-06-12 19:52:42,325 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 172 transitions. Word has length 15 [2021-06-12 19:52:42,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:42,325 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 172 transitions. [2021-06-12 19:52:42,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:42,326 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 172 transitions. [2021-06-12 19:52:42,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:42,326 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:42,326 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:42,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:42,551 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:42,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:42,551 INFO L82 PathProgramCache]: Analyzing trace with hash 961923201, now seen corresponding path program 23 times [2021-06-12 19:52:42,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:42,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714038405] [2021-06-12 19:52:42,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:42,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:42,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:42,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714038405] [2021-06-12 19:52:42,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714038405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:42,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892350215] [2021-06-12 19:52:42,612 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 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 [2021-06-12 19:52:42,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:42,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:42,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:52:42,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:42,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:42,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892350215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:42,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:42,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:52:42,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898244748] [2021-06-12 19:52:42,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:52:42,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:42,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:52:42,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:52:42,739 INFO L87 Difference]: Start difference. First operand 81 states and 172 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:42,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:42,790 INFO L93 Difference]: Finished difference Result 91 states and 190 transitions. [2021-06-12 19:52:42,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:52:42,790 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 15 [2021-06-12 19:52:42,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:42,791 INFO L225 Difference]: With dead ends: 91 [2021-06-12 19:52:42,791 INFO L226 Difference]: Without dead ends: 91 [2021-06-12 19:52:42,792 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:52:42,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-12 19:52:42,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2021-06-12 19:52:42,800 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) [2021-06-12 19:52:42,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-06-12 19:52:42,802 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 15 [2021-06-12 19:52:42,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:42,802 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-06-12 19:52:42,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:42,802 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-06-12 19:52:42,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:42,803 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:42,803 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:43,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-12 19:52:43,025 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:43,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:43,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1551463716, now seen corresponding path program 24 times [2021-06-12 19:52:43,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:43,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679464543] [2021-06-12 19:52:43,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:43,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:43,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679464543] [2021-06-12 19:52:43,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679464543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:43,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181519572] [2021-06-12 19:52:43,083 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 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 [2021-06-12 19:52:43,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:52:43,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:43,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:52:43,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:43,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181519572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:43,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:43,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:52:43,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031989807] [2021-06-12 19:52:43,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:52:43,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:43,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:52:43,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:52:43,248 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:43,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:43,290 INFO L93 Difference]: Finished difference Result 84 states and 177 transitions. [2021-06-12 19:52:43,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:52:43,290 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 15 [2021-06-12 19:52:43,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:43,291 INFO L225 Difference]: With dead ends: 84 [2021-06-12 19:52:43,291 INFO L226 Difference]: Without dead ends: 84 [2021-06-12 19:52:43,291 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:52:43,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-12 19:52:43,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2021-06-12 19:52:43,293 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) [2021-06-12 19:52:43,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-06-12 19:52:43,293 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 15 [2021-06-12 19:52:43,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:43,293 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-06-12 19:52:43,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:43,293 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-06-12 19:52:43,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:43,294 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:43,294 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:43,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:43,517 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:43,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:43,517 INFO L82 PathProgramCache]: Analyzing trace with hash 930413889, now seen corresponding path program 25 times [2021-06-12 19:52:43,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:43,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630148759] [2021-06-12 19:52:43,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:43,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:43,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630148759] [2021-06-12 19:52:43,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630148759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:43,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159417294] [2021-06-12 19:52:43,574 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 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 [2021-06-12 19:52:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:43,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:52:43,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:43,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159417294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:43,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:43,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:52:43,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984800378] [2021-06-12 19:52:43,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:52:43,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:43,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:52:43,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:52:43,739 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:43,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:43,844 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-06-12 19:52:43,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:52:43,845 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 15 [2021-06-12 19:52:43,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:43,845 INFO L225 Difference]: With dead ends: 101 [2021-06-12 19:52:43,845 INFO L226 Difference]: Without dead ends: 101 [2021-06-12 19:52:43,845 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 195.9ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:52:43,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-12 19:52:43,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 80. [2021-06-12 19:52:43,851 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) [2021-06-12 19:52:43,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-06-12 19:52:43,851 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 15 [2021-06-12 19:52:43,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:43,851 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-06-12 19:52:43,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:43,851 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-06-12 19:52:43,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:43,852 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:43,852 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:44,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-12 19:52:44,057 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:44,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:44,057 INFO L82 PathProgramCache]: Analyzing trace with hash -742071201, now seen corresponding path program 26 times [2021-06-12 19:52:44,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:44,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87846108] [2021-06-12 19:52:44,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:44,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:44,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87846108] [2021-06-12 19:52:44,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87846108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:44,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038504369] [2021-06-12 19:52:44,110 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 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 [2021-06-12 19:52:44,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:44,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:44,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:52:44,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:44,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038504369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:44,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:44,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:52:44,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243549684] [2021-06-12 19:52:44,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:52:44,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:44,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:52:44,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:52:44,268 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:44,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:44,346 INFO L93 Difference]: Finished difference Result 89 states and 182 transitions. [2021-06-12 19:52:44,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:52:44,347 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 15 [2021-06-12 19:52:44,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:44,347 INFO L225 Difference]: With dead ends: 89 [2021-06-12 19:52:44,347 INFO L226 Difference]: Without dead ends: 83 [2021-06-12 19:52:44,347 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:52:44,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-12 19:52:44,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2021-06-12 19:52:44,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1265822784810124) internal successors, (168), 79 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) [2021-06-12 19:52:44,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 168 transitions. [2021-06-12 19:52:44,350 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 168 transitions. Word has length 15 [2021-06-12 19:52:44,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:44,350 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 168 transitions. [2021-06-12 19:52:44,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:44,350 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 168 transitions. [2021-06-12 19:52:44,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:44,350 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:44,350 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:44,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-12 19:52:44,557 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:44,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:44,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1373313029, now seen corresponding path program 27 times [2021-06-12 19:52:44,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:44,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435766203] [2021-06-12 19:52:44,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:44,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:44,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435766203] [2021-06-12 19:52:44,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435766203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:44,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283171958] [2021-06-12 19:52:44,615 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 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 [2021-06-12 19:52:44,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:52:44,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:44,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:52:44,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:44,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283171958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:44,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:44,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:52:44,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820222491] [2021-06-12 19:52:44,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:52:44,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:44,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:52:44,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:52:44,834 INFO L87 Difference]: Start difference. First operand 80 states and 168 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:45,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:45,075 INFO L93 Difference]: Finished difference Result 122 states and 241 transitions. [2021-06-12 19:52:45,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:52:45,092 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 15 [2021-06-12 19:52:45,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:45,092 INFO L225 Difference]: With dead ends: 122 [2021-06-12 19:52:45,092 INFO L226 Difference]: Without dead ends: 122 [2021-06-12 19:52:45,092 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 344.4ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:52:45,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-12 19:52:45,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 80. [2021-06-12 19:52:45,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1265822784810124) internal successors, (168), 79 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) [2021-06-12 19:52:45,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 168 transitions. [2021-06-12 19:52:45,095 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 168 transitions. Word has length 15 [2021-06-12 19:52:45,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:45,095 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 168 transitions. [2021-06-12 19:52:45,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:45,095 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 168 transitions. [2021-06-12 19:52:45,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:45,095 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:45,095 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:45,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:45,318 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:45,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:45,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1660863264, now seen corresponding path program 28 times [2021-06-12 19:52:45,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:45,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249203180] [2021-06-12 19:52:45,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:45,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:45,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:45,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249203180] [2021-06-12 19:52:45,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249203180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:45,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655983933] [2021-06-12 19:52:45,367 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 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 [2021-06-12 19:52:45,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:52:45,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:45,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:52:45,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:45,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655983933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:45,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:45,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:52:45,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560425211] [2021-06-12 19:52:45,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:52:45,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:45,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:52:45,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:52:45,475 INFO L87 Difference]: Start difference. First operand 80 states and 168 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:45,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:45,697 INFO L93 Difference]: Finished difference Result 152 states and 289 transitions. [2021-06-12 19:52:45,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:52:45,697 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 15 [2021-06-12 19:52:45,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:45,698 INFO L225 Difference]: With dead ends: 152 [2021-06-12 19:52:45,698 INFO L226 Difference]: Without dead ends: 152 [2021-06-12 19:52:45,698 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 231.1ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:52:45,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-12 19:52:45,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 80. [2021-06-12 19:52:45,701 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) [2021-06-12 19:52:45,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-06-12 19:52:45,701 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 15 [2021-06-12 19:52:45,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:45,701 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-06-12 19:52:45,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:45,701 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-06-12 19:52:45,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:45,702 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:45,702 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:45,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-12 19:52:45,925 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:45,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:45,925 INFO L82 PathProgramCache]: Analyzing trace with hash -299172061, now seen corresponding path program 29 times [2021-06-12 19:52:45,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:45,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534183458] [2021-06-12 19:52:45,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:45,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:45,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534183458] [2021-06-12 19:52:45,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534183458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:45,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873912754] [2021-06-12 19:52:45,979 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 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 [2021-06-12 19:52:46,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:46,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:46,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:52:46,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:46,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873912754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:46,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:46,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:52:46,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737450732] [2021-06-12 19:52:46,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:52:46,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:46,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:52:46,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:52:46,183 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:46,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:46,507 INFO L93 Difference]: Finished difference Result 129 states and 251 transitions. [2021-06-12 19:52:46,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:52:46,507 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 15 [2021-06-12 19:52:46,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:46,508 INFO L225 Difference]: With dead ends: 129 [2021-06-12 19:52:46,508 INFO L226 Difference]: Without dead ends: 123 [2021-06-12 19:52:46,508 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 393.5ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:52:46,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-12 19:52:46,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 80. [2021-06-12 19:52:46,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1265822784810124) internal successors, (168), 79 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) [2021-06-12 19:52:46,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 168 transitions. [2021-06-12 19:52:46,510 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 168 transitions. Word has length 15 [2021-06-12 19:52:46,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:46,510 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 168 transitions. [2021-06-12 19:52:46,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:46,511 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 168 transitions. [2021-06-12 19:52:46,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:46,511 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:46,511 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:46,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-12 19:52:46,721 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:46,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:46,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1962853544, now seen corresponding path program 30 times [2021-06-12 19:52:46,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:46,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475423230] [2021-06-12 19:52:46,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:46,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:46,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:46,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475423230] [2021-06-12 19:52:46,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475423230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:46,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424278107] [2021-06-12 19:52:46,785 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 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 [2021-06-12 19:52:46,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:52:46,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:46,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:52:46,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:46,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424278107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:46,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:46,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:52:46,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008202316] [2021-06-12 19:52:46,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:52:46,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:46,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:52:46,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:52:46,908 INFO L87 Difference]: Start difference. First operand 80 states and 168 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:47,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:47,004 INFO L93 Difference]: Finished difference Result 123 states and 249 transitions. [2021-06-12 19:52:47,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:52:47,005 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 15 [2021-06-12 19:52:47,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:47,005 INFO L225 Difference]: With dead ends: 123 [2021-06-12 19:52:47,005 INFO L226 Difference]: Without dead ends: 123 [2021-06-12 19:52:47,005 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:52:47,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-12 19:52:47,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 80. [2021-06-12 19:52:47,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1265822784810124) internal successors, (168), 79 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) [2021-06-12 19:52:47,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 168 transitions. [2021-06-12 19:52:47,008 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 168 transitions. Word has length 15 [2021-06-12 19:52:47,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:47,008 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 168 transitions. [2021-06-12 19:52:47,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2021-06-12 19:52:47,008 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 168 transitions. [2021-06-12 19:52:47,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:47,009 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:47,009 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:47,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:47,217 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:47,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:47,217 INFO L82 PathProgramCache]: Analyzing trace with hash 207174205, now seen corresponding path program 31 times [2021-06-12 19:52:47,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:47,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627054853] [2021-06-12 19:52:47,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:47,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:47,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627054853] [2021-06-12 19:52:47,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627054853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:47,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457894502] [2021-06-12 19:52:47,270 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 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 [2021-06-12 19:52:47,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:47,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:52:47,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:47,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457894502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:47,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:47,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 19:52:47,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567111203] [2021-06-12 19:52:47,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:52:47,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:47,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:52:47,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:52:47,424 INFO L87 Difference]: Start difference. First operand 80 states and 168 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2021-06-12 19:52:47,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:47,516 INFO L93 Difference]: Finished difference Result 107 states and 214 transitions. [2021-06-12 19:52:47,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:52:47,517 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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 15 [2021-06-12 19:52:47,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:47,517 INFO L225 Difference]: With dead ends: 107 [2021-06-12 19:52:47,517 INFO L226 Difference]: Without dead ends: 96 [2021-06-12 19:52:47,517 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 184.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:52:47,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-12 19:52:47,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 75. [2021-06-12 19:52:47,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.135135135135135) internal successors, (158), 74 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) [2021-06-12 19:52:47,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 158 transitions. [2021-06-12 19:52:47,520 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 158 transitions. Word has length 15 [2021-06-12 19:52:47,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:47,520 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 158 transitions. [2021-06-12 19:52:47,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2021-06-12 19:52:47,520 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 158 transitions. [2021-06-12 19:52:47,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:47,520 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:47,520 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:47,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-12 19:52:47,725 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:47,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:47,725 INFO L82 PathProgramCache]: Analyzing trace with hash 868761956, now seen corresponding path program 32 times [2021-06-12 19:52:47,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:47,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147551081] [2021-06-12 19:52:47,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:47,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:47,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147551081] [2021-06-12 19:52:47,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147551081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:47,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509377880] [2021-06-12 19:52:47,773 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 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 [2021-06-12 19:52:47,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:47,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:47,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:52:47,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:47,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509377880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:47,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:47,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 19:52:47,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62832321] [2021-06-12 19:52:47,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:52:47,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:47,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:52:47,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:52:47,853 INFO L87 Difference]: Start difference. First operand 75 states and 158 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2021-06-12 19:52:47,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:47,920 INFO L93 Difference]: Finished difference Result 110 states and 222 transitions. [2021-06-12 19:52:47,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:52:47,921 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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 15 [2021-06-12 19:52:47,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:47,921 INFO L225 Difference]: With dead ends: 110 [2021-06-12 19:52:47,921 INFO L226 Difference]: Without dead ends: 110 [2021-06-12 19:52:47,921 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:52:47,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-12 19:52:47,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 73. [2021-06-12 19:52:47,923 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) [2021-06-12 19:52:47,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 151 transitions. [2021-06-12 19:52:47,924 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 151 transitions. Word has length 15 [2021-06-12 19:52:47,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:47,924 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 151 transitions. [2021-06-12 19:52:47,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2021-06-12 19:52:47,924 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 151 transitions. [2021-06-12 19:52:47,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:47,924 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:47,924 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:48,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-12 19:52:48,141 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:48,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:48,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1907254775, now seen corresponding path program 33 times [2021-06-12 19:52:48,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:48,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911057011] [2021-06-12 19:52:48,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:48,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:48,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:48,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911057011] [2021-06-12 19:52:48,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911057011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:48,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088042939] [2021-06-12 19:52:48,341 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 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 [2021-06-12 19:52:48,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:52:48,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:48,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:52:48,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:48,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088042939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:48,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:48,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:52:48,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077438488] [2021-06-12 19:52:48,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:52:48,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:48,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:52:48,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:52:48,700 INFO L87 Difference]: Start difference. First operand 73 states and 151 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) [2021-06-12 19:52:49,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:49,022 INFO L93 Difference]: Finished difference Result 138 states and 265 transitions. [2021-06-12 19:52:49,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:52:49,023 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 16 [2021-06-12 19:52:49,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:49,024 INFO L225 Difference]: With dead ends: 138 [2021-06-12 19:52:49,024 INFO L226 Difference]: Without dead ends: 123 [2021-06-12 19:52:49,024 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 642.3ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:52:49,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-12 19:52:49,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 74. [2021-06-12 19:52:49,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.095890410958904) internal successors, (153), 73 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) [2021-06-12 19:52:49,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 153 transitions. [2021-06-12 19:52:49,026 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 153 transitions. Word has length 16 [2021-06-12 19:52:49,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:49,026 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 153 transitions. [2021-06-12 19:52:49,026 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) [2021-06-12 19:52:49,026 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 153 transitions. [2021-06-12 19:52:49,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:49,027 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:49,027 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:49,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:49,227 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:49,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:49,228 INFO L82 PathProgramCache]: Analyzing trace with hash 233295193, now seen corresponding path program 34 times [2021-06-12 19:52:49,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:49,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847266811] [2021-06-12 19:52:49,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:49,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:49,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:49,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847266811] [2021-06-12 19:52:49,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847266811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:49,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245018682] [2021-06-12 19:52:49,405 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 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 [2021-06-12 19:52:49,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:52:49,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:49,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:52:49,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:49,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245018682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:49,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:49,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:52:49,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121424858] [2021-06-12 19:52:49,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:52:49,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:49,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:52:49,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:52:49,739 INFO L87 Difference]: Start difference. First operand 74 states and 153 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) [2021-06-12 19:52:50,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:50,370 INFO L93 Difference]: Finished difference Result 138 states and 266 transitions. [2021-06-12 19:52:50,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:52:50,371 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 16 [2021-06-12 19:52:50,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:50,372 INFO L225 Difference]: With dead ends: 138 [2021-06-12 19:52:50,372 INFO L226 Difference]: Without dead ends: 125 [2021-06-12 19:52:50,372 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 822.0ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:52:50,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-12 19:52:50,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 75. [2021-06-12 19:52:50,374 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) [2021-06-12 19:52:50,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-06-12 19:52:50,374 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 16 [2021-06-12 19:52:50,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:50,374 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-06-12 19:52:50,375 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) [2021-06-12 19:52:50,375 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-06-12 19:52:50,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:50,375 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:50,375 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:50,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-12 19:52:50,597 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:50,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:50,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1344046537, now seen corresponding path program 35 times [2021-06-12 19:52:50,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:50,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130607167] [2021-06-12 19:52:50,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:50,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:50,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130607167] [2021-06-12 19:52:50,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130607167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:50,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302617753] [2021-06-12 19:52:50,821 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 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 [2021-06-12 19:52:50,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:50,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:50,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:52:50,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:51,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302617753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:51,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:51,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:52:51,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713669838] [2021-06-12 19:52:51,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:52:51,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:51,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:52:51,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:52:51,131 INFO L87 Difference]: Start difference. First operand 75 states and 155 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) [2021-06-12 19:52:52,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:52,155 INFO L93 Difference]: Finished difference Result 163 states and 313 transitions. [2021-06-12 19:52:52,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:52:52,155 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 16 [2021-06-12 19:52:52,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:52,156 INFO L225 Difference]: With dead ends: 163 [2021-06-12 19:52:52,156 INFO L226 Difference]: Without dead ends: 145 [2021-06-12 19:52:52,156 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1174.6ms TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:52:52,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-12 19:52:52,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 75. [2021-06-12 19:52:52,158 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) [2021-06-12 19:52:52,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-06-12 19:52:52,159 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 16 [2021-06-12 19:52:52,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:52,159 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-06-12 19:52:52,159 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) [2021-06-12 19:52:52,159 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-06-12 19:52:52,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:52,159 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:52,159 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:52,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:52,385 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:52,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:52,385 INFO L82 PathProgramCache]: Analyzing trace with hash -806940605, now seen corresponding path program 36 times [2021-06-12 19:52:52,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:52,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073166946] [2021-06-12 19:52:52,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:52,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:52,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073166946] [2021-06-12 19:52:52,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073166946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:52,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252054177] [2021-06-12 19:52:52,592 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 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 [2021-06-12 19:52:52,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:52:52,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:52,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:52:52,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:52,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252054177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:52,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:52,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:52:52,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563075758] [2021-06-12 19:52:52,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:52:52,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:52,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:52:52,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:52:52,967 INFO L87 Difference]: Start difference. First operand 75 states and 155 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) [2021-06-12 19:52:53,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:53,428 INFO L93 Difference]: Finished difference Result 116 states and 226 transitions. [2021-06-12 19:52:53,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:52:53,428 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 16 [2021-06-12 19:52:53,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:53,429 INFO L225 Difference]: With dead ends: 116 [2021-06-12 19:52:53,429 INFO L226 Difference]: Without dead ends: 103 [2021-06-12 19:52:53,429 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 770.5ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:52:53,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-12 19:52:53,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 77. [2021-06-12 19:52:53,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 76 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) [2021-06-12 19:52:53,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 159 transitions. [2021-06-12 19:52:53,431 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 159 transitions. Word has length 16 [2021-06-12 19:52:53,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:53,431 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 159 transitions. [2021-06-12 19:52:53,431 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) [2021-06-12 19:52:53,431 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 159 transitions. [2021-06-12 19:52:53,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:53,431 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:53,431 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:53,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-12 19:52:53,637 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:53,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:53,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1910684961, now seen corresponding path program 37 times [2021-06-12 19:52:53,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:53,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209428718] [2021-06-12 19:52:53,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:53,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:53,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209428718] [2021-06-12 19:52:53,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209428718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:53,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438732112] [2021-06-12 19:52:53,918 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 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 [2021-06-12 19:52:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:53,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:52:53,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:54,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:54,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438732112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:54,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:54,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:52:54,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926342457] [2021-06-12 19:52:54,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:52:54,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:54,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:52:54,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:52:54,225 INFO L87 Difference]: Start difference. First operand 77 states and 159 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) [2021-06-12 19:52:54,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:54,872 INFO L93 Difference]: Finished difference Result 128 states and 249 transitions. [2021-06-12 19:52:54,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:52:54,872 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 16 [2021-06-12 19:52:54,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:54,873 INFO L225 Difference]: With dead ends: 128 [2021-06-12 19:52:54,873 INFO L226 Difference]: Without dead ends: 121 [2021-06-12 19:52:54,873 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 862.8ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:52:54,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-12 19:52:54,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 78. [2021-06-12 19:52:54,875 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) [2021-06-12 19:52:54,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 162 transitions. [2021-06-12 19:52:54,875 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 162 transitions. Word has length 16 [2021-06-12 19:52:54,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:54,875 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 162 transitions. [2021-06-12 19:52:54,875 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) [2021-06-12 19:52:54,875 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 162 transitions. [2021-06-12 19:52:54,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:54,876 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:54,876 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:55,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-12 19:52:55,085 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:55,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:55,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1049691005, now seen corresponding path program 38 times [2021-06-12 19:52:55,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:55,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624534299] [2021-06-12 19:52:55,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:55,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:55,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624534299] [2021-06-12 19:52:55,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624534299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:55,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799878983] [2021-06-12 19:52:55,265 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 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 [2021-06-12 19:52:55,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:55,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:55,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:52:55,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:55,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799878983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:55,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:55,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:52:55,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096864330] [2021-06-12 19:52:55,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:52:55,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:55,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:52:55,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:52:55,612 INFO L87 Difference]: Start difference. First operand 78 states and 162 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) [2021-06-12 19:52:56,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:56,235 INFO L93 Difference]: Finished difference Result 141 states and 268 transitions. [2021-06-12 19:52:56,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:52:56,236 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 16 [2021-06-12 19:52:56,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:56,236 INFO L225 Difference]: With dead ends: 141 [2021-06-12 19:52:56,236 INFO L226 Difference]: Without dead ends: 111 [2021-06-12 19:52:56,237 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 772.9ms TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:52:56,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-12 19:52:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 79. [2021-06-12 19:52:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.08974358974359) internal successors, (163), 78 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) [2021-06-12 19:52:56,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 163 transitions. [2021-06-12 19:52:56,239 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 163 transitions. Word has length 16 [2021-06-12 19:52:56,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:56,239 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 163 transitions. [2021-06-12 19:52:56,239 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) [2021-06-12 19:52:56,239 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 163 transitions. [2021-06-12 19:52:56,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:56,239 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:56,240 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:56,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:56,440 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:56,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:56,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1877936069, now seen corresponding path program 39 times [2021-06-12 19:52:56,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:56,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492868335] [2021-06-12 19:52:56,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:56,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:56,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492868335] [2021-06-12 19:52:56,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492868335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:56,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114239012] [2021-06-12 19:52:56,716 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 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 [2021-06-12 19:52:56,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:52:56,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:56,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:52:56,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:57,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:57,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114239012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:57,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:57,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:52:57,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099770681] [2021-06-12 19:52:57,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:52:57,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:57,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:52:57,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:52:57,067 INFO L87 Difference]: Start difference. First operand 79 states and 163 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) [2021-06-12 19:52:57,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:57,717 INFO L93 Difference]: Finished difference Result 145 states and 279 transitions. [2021-06-12 19:52:57,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:52:57,718 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 16 [2021-06-12 19:52:57,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:57,718 INFO L225 Difference]: With dead ends: 145 [2021-06-12 19:52:57,718 INFO L226 Difference]: Without dead ends: 127 [2021-06-12 19:52:57,719 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 926.4ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:52:57,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-12 19:52:57,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2021-06-12 19:52:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.1204819277108435) internal successors, (176), 83 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) [2021-06-12 19:52:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 176 transitions. [2021-06-12 19:52:57,721 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 176 transitions. Word has length 16 [2021-06-12 19:52:57,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:57,721 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 176 transitions. [2021-06-12 19:52:57,721 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) [2021-06-12 19:52:57,721 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 176 transitions. [2021-06-12 19:52:57,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:57,721 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:57,721 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:57,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-12 19:52:57,937 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:57,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:57,937 INFO L82 PathProgramCache]: Analyzing trace with hash -543344739, now seen corresponding path program 40 times [2021-06-12 19:52:57,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:57,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494627897] [2021-06-12 19:52:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:58,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:58,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494627897] [2021-06-12 19:52:58,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494627897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:58,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569390394] [2021-06-12 19:52:58,126 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 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 [2021-06-12 19:52:58,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:52:58,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:58,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:52:58,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:58,394 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-06-12 19:52:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:58,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569390394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:58,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:58,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:52:58,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118213772] [2021-06-12 19:52:58,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:52:58,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:58,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:52:58,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:52:58,560 INFO L87 Difference]: Start difference. First operand 84 states and 176 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) [2021-06-12 19:52:59,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:59,358 INFO L93 Difference]: Finished difference Result 173 states and 327 transitions. [2021-06-12 19:52:59,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:52:59,358 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 16 [2021-06-12 19:52:59,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:59,358 INFO L225 Difference]: With dead ends: 173 [2021-06-12 19:52:59,359 INFO L226 Difference]: Without dead ends: 154 [2021-06-12 19:52:59,359 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1019.5ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:52:59,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-12 19:52:59,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 84. [2021-06-12 19:52:59,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.1325301204819276) internal successors, (177), 83 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) [2021-06-12 19:52:59,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 177 transitions. [2021-06-12 19:52:59,361 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 177 transitions. Word has length 16 [2021-06-12 19:52:59,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:59,361 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 177 transitions. [2021-06-12 19:52:59,361 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) [2021-06-12 19:52:59,362 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 177 transitions. [2021-06-12 19:52:59,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:59,362 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:59,362 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:59,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:59,565 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:59,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:59,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1081200317, now seen corresponding path program 41 times [2021-06-12 19:52:59,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:59,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819369410] [2021-06-12 19:52:59,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:59,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:59,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819369410] [2021-06-12 19:52:59,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819369410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:59,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910374438] [2021-06-12 19:52:59,722 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 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 [2021-06-12 19:52:59,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:52:59,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:59,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:52:59,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:00,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910374438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:00,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:00,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:53:00,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134239892] [2021-06-12 19:53:00,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:00,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:00,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:00,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:00,111 INFO L87 Difference]: Start difference. First operand 84 states and 177 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) [2021-06-12 19:53:00,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:00,767 INFO L93 Difference]: Finished difference Result 179 states and 342 transitions. [2021-06-12 19:53:00,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:53:00,767 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 16 [2021-06-12 19:53:00,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:00,768 INFO L225 Difference]: With dead ends: 179 [2021-06-12 19:53:00,768 INFO L226 Difference]: Without dead ends: 160 [2021-06-12 19:53:00,768 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 832.3ms TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:53:00,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-12 19:53:00,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 86. [2021-06-12 19:53:00,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:00,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-06-12 19:53:00,771 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 16 [2021-06-12 19:53:00,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:00,771 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-06-12 19:53:00,771 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) [2021-06-12 19:53:00,771 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-06-12 19:53:00,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:00,771 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:00,771 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:00,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-12 19:53:00,985 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:00,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:00,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1305488025, now seen corresponding path program 42 times [2021-06-12 19:53:00,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:00,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184673963] [2021-06-12 19:53:00,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:01,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:01,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:01,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184673963] [2021-06-12 19:53:01,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184673963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:01,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024880629] [2021-06-12 19:53:01,192 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 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 [2021-06-12 19:53:01,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:53:01,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:01,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:53:01,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:01,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024880629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:01,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:01,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:53:01,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120588700] [2021-06-12 19:53:01,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:53:01,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:01,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:53:01,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:53:01,565 INFO L87 Difference]: Start difference. First operand 86 states and 182 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) [2021-06-12 19:53:01,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:01,912 INFO L93 Difference]: Finished difference Result 107 states and 215 transitions. [2021-06-12 19:53:01,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:53:01,913 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 16 [2021-06-12 19:53:01,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:01,916 INFO L225 Difference]: With dead ends: 107 [2021-06-12 19:53:01,916 INFO L226 Difference]: Without dead ends: 94 [2021-06-12 19:53:01,917 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 652.6ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:53:01,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-12 19:53:01,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2021-06-12 19:53:01,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.13953488372093) internal successors, (184), 86 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:01,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 184 transitions. [2021-06-12 19:53:01,919 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 184 transitions. Word has length 16 [2021-06-12 19:53:01,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:01,919 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 184 transitions. [2021-06-12 19:53:01,919 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) [2021-06-12 19:53:01,920 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 184 transitions. [2021-06-12 19:53:01,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:01,920 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:01,920 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:02,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:02,137 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:02,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:02,137 INFO L82 PathProgramCache]: Analyzing trace with hash -271853705, now seen corresponding path program 43 times [2021-06-12 19:53:02,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:02,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128381047] [2021-06-12 19:53:02,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:02,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:02,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128381047] [2021-06-12 19:53:02,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128381047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:02,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489134522] [2021-06-12 19:53:02,429 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 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 [2021-06-12 19:53:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:02,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:53:02,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:02,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:02,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489134522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:02,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:02,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:53:02,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633266251] [2021-06-12 19:53:02,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:02,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:02,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:02,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:02,756 INFO L87 Difference]: Start difference. First operand 87 states and 184 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) [2021-06-12 19:53:03,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:03,439 INFO L93 Difference]: Finished difference Result 119 states and 238 transitions. [2021-06-12 19:53:03,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:53:03,439 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 16 [2021-06-12 19:53:03,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:03,440 INFO L225 Difference]: With dead ends: 119 [2021-06-12 19:53:03,440 INFO L226 Difference]: Without dead ends: 112 [2021-06-12 19:53:03,440 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 903.4ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:53:03,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-12 19:53:03,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 88. [2021-06-12 19:53:03,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1494252873563218) internal successors, (187), 87 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:03,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 187 transitions. [2021-06-12 19:53:03,442 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 187 transitions. Word has length 16 [2021-06-12 19:53:03,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:03,443 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 187 transitions. [2021-06-12 19:53:03,443 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) [2021-06-12 19:53:03,443 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 187 transitions. [2021-06-12 19:53:03,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:03,443 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:03,443 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:03,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:03,657 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:03,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:03,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1062737625, now seen corresponding path program 44 times [2021-06-12 19:53:03,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:03,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316971712] [2021-06-12 19:53:03,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:03,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:03,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316971712] [2021-06-12 19:53:03,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316971712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:03,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958830336] [2021-06-12 19:53:03,832 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 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 [2021-06-12 19:53:03,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:03,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:03,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:53:03,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:04,055 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-06-12 19:53:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:04,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958830336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:04,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:04,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:53:04,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231507915] [2021-06-12 19:53:04,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:04,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:04,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:04,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:04,261 INFO L87 Difference]: Start difference. First operand 88 states and 187 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) [2021-06-12 19:53:04,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:04,801 INFO L93 Difference]: Finished difference Result 144 states and 276 transitions. [2021-06-12 19:53:04,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:53:04,801 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 16 [2021-06-12 19:53:04,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:04,802 INFO L225 Difference]: With dead ends: 144 [2021-06-12 19:53:04,802 INFO L226 Difference]: Without dead ends: 118 [2021-06-12 19:53:04,802 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 818.9ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:53:04,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-12 19:53:04,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2021-06-12 19:53:04,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1494252873563218) internal successors, (187), 87 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:04,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 187 transitions. [2021-06-12 19:53:04,804 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 187 transitions. Word has length 16 [2021-06-12 19:53:04,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:04,804 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 187 transitions. [2021-06-12 19:53:04,804 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) [2021-06-12 19:53:04,804 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 187 transitions. [2021-06-12 19:53:04,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:04,804 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:04,804 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:05,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:05,019 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:05,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:05,019 INFO L82 PathProgramCache]: Analyzing trace with hash 234492561, now seen corresponding path program 45 times [2021-06-12 19:53:05,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:05,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590701448] [2021-06-12 19:53:05,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:05,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:05,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:05,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:05,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590701448] [2021-06-12 19:53:05,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590701448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:05,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926684493] [2021-06-12 19:53:05,215 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 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 [2021-06-12 19:53:05,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:53:05,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:05,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:53:05,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:05,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:05,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926684493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:05,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:05,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:53:05,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659083051] [2021-06-12 19:53:05,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:05,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:05,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:05,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:05,584 INFO L87 Difference]: Start difference. First operand 88 states and 187 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) [2021-06-12 19:53:06,243 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-06-12 19:53:06,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:06,415 INFO L93 Difference]: Finished difference Result 141 states and 272 transitions. [2021-06-12 19:53:06,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:53:06,415 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 16 [2021-06-12 19:53:06,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:06,416 INFO L225 Difference]: With dead ends: 141 [2021-06-12 19:53:06,416 INFO L226 Difference]: Without dead ends: 116 [2021-06-12 19:53:06,416 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1056.3ms TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:53:06,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-12 19:53:06,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 91. [2021-06-12 19:53:06,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1666666666666665) internal successors, (195), 90 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:06,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 195 transitions. [2021-06-12 19:53:06,418 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 195 transitions. Word has length 16 [2021-06-12 19:53:06,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:06,418 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 195 transitions. [2021-06-12 19:53:06,418 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) [2021-06-12 19:53:06,418 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 195 transitions. [2021-06-12 19:53:06,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:06,419 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:06,419 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:06,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:06,629 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:06,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:06,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1031228313, now seen corresponding path program 46 times [2021-06-12 19:53:06,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:06,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764190879] [2021-06-12 19:53:06,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:06,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:06,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:06,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:06,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764190879] [2021-06-12 19:53:06,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764190879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:06,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525223849] [2021-06-12 19:53:06,784 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 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 [2021-06-12 19:53:06,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:53:06,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:06,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:53:06,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:07,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525223849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:07,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:07,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:53:07,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61147755] [2021-06-12 19:53:07,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:07,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:07,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:07,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:07,160 INFO L87 Difference]: Start difference. First operand 91 states and 195 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) [2021-06-12 19:53:07,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:07,604 INFO L93 Difference]: Finished difference Result 150 states and 295 transitions. [2021-06-12 19:53:07,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:53:07,605 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 16 [2021-06-12 19:53:07,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:07,605 INFO L225 Difference]: With dead ends: 150 [2021-06-12 19:53:07,605 INFO L226 Difference]: Without dead ends: 124 [2021-06-12 19:53:07,606 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 664.3ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:53:07,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-12 19:53:07,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 94. [2021-06-12 19:53:07,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:07,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-06-12 19:53:07,608 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 16 [2021-06-12 19:53:07,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:07,608 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-06-12 19:53:07,608 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) [2021-06-12 19:53:07,608 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-06-12 19:53:07,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:07,609 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:07,609 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:07,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2021-06-12 19:53:07,827 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:07,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:07,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1248642377, now seen corresponding path program 47 times [2021-06-12 19:53:07,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:07,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111825394] [2021-06-12 19:53:07,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:08,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:08,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:08,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111825394] [2021-06-12 19:53:08,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111825394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:08,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335653531] [2021-06-12 19:53:08,036 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 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 [2021-06-12 19:53:08,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:53:08,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:08,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:53:08,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:08,271 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-06-12 19:53:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:08,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335653531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:08,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:08,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:53:08,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097782520] [2021-06-12 19:53:08,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:08,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:08,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:08,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:08,381 INFO L87 Difference]: Start difference. First operand 94 states and 204 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) [2021-06-12 19:53:08,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:08,937 INFO L93 Difference]: Finished difference Result 176 states and 339 transitions. [2021-06-12 19:53:08,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:53:08,937 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 16 [2021-06-12 19:53:08,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:08,938 INFO L225 Difference]: With dead ends: 176 [2021-06-12 19:53:08,938 INFO L226 Difference]: Without dead ends: 158 [2021-06-12 19:53:08,938 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 815.5ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:53:08,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-12 19:53:08,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 97. [2021-06-12 19:53:08,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.2083333333333335) internal successors, (212), 96 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:08,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 212 transitions. [2021-06-12 19:53:08,940 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 212 transitions. Word has length 16 [2021-06-12 19:53:08,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:08,941 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 212 transitions. [2021-06-12 19:53:08,941 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) [2021-06-12 19:53:08,941 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 212 transitions. [2021-06-12 19:53:08,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:08,941 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:08,941 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:09,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:09,149 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:09,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:09,149 INFO L82 PathProgramCache]: Analyzing trace with hash -565135694, now seen corresponding path program 48 times [2021-06-12 19:53:09,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:09,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282564588] [2021-06-12 19:53:09,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:53:09,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:09,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282564588] [2021-06-12 19:53:09,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282564588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:09,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451648040] [2021-06-12 19:53:09,200 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 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 [2021-06-12 19:53:09,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:53:09,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:09,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:53:09,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:09,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:53:09,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451648040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:09,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:09,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:53:09,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495577288] [2021-06-12 19:53:09,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:53:09,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:09,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:53:09,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:53:09,393 INFO L87 Difference]: Start difference. First operand 97 states and 212 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) [2021-06-12 19:53:09,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:09,422 INFO L93 Difference]: Finished difference Result 99 states and 210 transitions. [2021-06-12 19:53:09,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:53:09,422 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 16 [2021-06-12 19:53:09,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:09,422 INFO L225 Difference]: With dead ends: 99 [2021-06-12 19:53:09,422 INFO L226 Difference]: Without dead ends: 99 [2021-06-12 19:53:09,423 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 129.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:53:09,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-12 19:53:09,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 86. [2021-06-12 19:53:09,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.176470588235294) internal successors, (185), 85 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:09,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 185 transitions. [2021-06-12 19:53:09,424 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 185 transitions. Word has length 16 [2021-06-12 19:53:09,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:09,424 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 185 transitions. [2021-06-12 19:53:09,424 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) [2021-06-12 19:53:09,424 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 185 transitions. [2021-06-12 19:53:09,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:09,424 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:09,424 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:09,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:09,625 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:09,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:09,625 INFO L82 PathProgramCache]: Analyzing trace with hash 85948953, now seen corresponding path program 49 times [2021-06-12 19:53:09,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:09,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710378923] [2021-06-12 19:53:09,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:09,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:09,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710378923] [2021-06-12 19:53:09,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710378923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:09,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33685468] [2021-06-12 19:53:09,796 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 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 [2021-06-12 19:53:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:09,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:53:09,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:10,060 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-06-12 19:53:10,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:10,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33685468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:10,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:10,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:53:10,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747278821] [2021-06-12 19:53:10,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:10,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:10,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:10,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:10,175 INFO L87 Difference]: Start difference. First operand 86 states and 185 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) [2021-06-12 19:53:10,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:10,776 INFO L93 Difference]: Finished difference Result 159 states and 305 transitions. [2021-06-12 19:53:10,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:53:10,776 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 16 [2021-06-12 19:53:10,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:10,777 INFO L225 Difference]: With dead ends: 159 [2021-06-12 19:53:10,777 INFO L226 Difference]: Without dead ends: 140 [2021-06-12 19:53:10,777 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 802.5ms TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:53:10,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-06-12 19:53:10,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 89. [2021-06-12 19:53:10,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.215909090909091) internal successors, (195), 88 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:10,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 195 transitions. [2021-06-12 19:53:10,781 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 195 transitions. Word has length 16 [2021-06-12 19:53:10,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:10,781 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 195 transitions. [2021-06-12 19:53:10,781 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) [2021-06-12 19:53:10,781 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 195 transitions. [2021-06-12 19:53:10,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:10,782 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:10,782 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:11,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:11,005 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:11,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:11,005 INFO L82 PathProgramCache]: Analyzing trace with hash -451906625, now seen corresponding path program 50 times [2021-06-12 19:53:11,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:11,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216187266] [2021-06-12 19:53:11,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:11,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:11,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216187266] [2021-06-12 19:53:11,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216187266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:11,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538842200] [2021-06-12 19:53:11,139 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 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 [2021-06-12 19:53:11,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:11,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:11,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:53:11,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:11,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:11,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538842200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:11,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:11,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:53:11,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012721844] [2021-06-12 19:53:11,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:11,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:11,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:11,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:11,500 INFO L87 Difference]: Start difference. First operand 89 states and 195 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) [2021-06-12 19:53:12,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:12,253 INFO L93 Difference]: Finished difference Result 146 states and 293 transitions. [2021-06-12 19:53:12,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:53:12,253 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 16 [2021-06-12 19:53:12,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:12,254 INFO L225 Difference]: With dead ends: 146 [2021-06-12 19:53:12,254 INFO L226 Difference]: Without dead ends: 106 [2021-06-12 19:53:12,254 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 926.1ms TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:53:12,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-12 19:53:12,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2021-06-12 19:53:12,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.215909090909091) internal successors, (195), 88 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:12,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 195 transitions. [2021-06-12 19:53:12,256 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 195 transitions. Word has length 16 [2021-06-12 19:53:12,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:12,256 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 195 transitions. [2021-06-12 19:53:12,256 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) [2021-06-12 19:53:12,256 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 195 transitions. [2021-06-12 19:53:12,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:12,257 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:12,257 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:12,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:12,479 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:12,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:12,480 INFO L82 PathProgramCache]: Analyzing trace with hash 54439641, now seen corresponding path program 51 times [2021-06-12 19:53:12,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:12,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529588229] [2021-06-12 19:53:12,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:12,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:12,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:12,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529588229] [2021-06-12 19:53:12,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529588229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:12,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974388780] [2021-06-12 19:53:12,611 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 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 [2021-06-12 19:53:12,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:53:12,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:12,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:53:12,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:12,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974388780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:12,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:12,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:53:12,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963108844] [2021-06-12 19:53:12,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:12,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:12,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:12,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:12,981 INFO L87 Difference]: Start difference. First operand 89 states and 195 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) [2021-06-12 19:53:13,360 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-06-12 19:53:13,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:13,849 INFO L93 Difference]: Finished difference Result 184 states and 344 transitions. [2021-06-12 19:53:13,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:53:13,849 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 16 [2021-06-12 19:53:13,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:13,849 INFO L225 Difference]: With dead ends: 184 [2021-06-12 19:53:13,849 INFO L226 Difference]: Without dead ends: 149 [2021-06-12 19:53:13,850 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 972.3ms TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:53:13,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-12 19:53:13,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 91. [2021-06-12 19:53:13,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.2111111111111112) internal successors, (199), 90 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:13,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 199 transitions. [2021-06-12 19:53:13,851 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 199 transitions. Word has length 16 [2021-06-12 19:53:13,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:13,852 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 199 transitions. [2021-06-12 19:53:13,852 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) [2021-06-12 19:53:13,852 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 199 transitions. [2021-06-12 19:53:13,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:13,852 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:13,852 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:14,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-12 19:53:14,069 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:14,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:14,069 INFO L82 PathProgramCache]: Analyzing trace with hash -2140856799, now seen corresponding path program 52 times [2021-06-12 19:53:14,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:14,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701002751] [2021-06-12 19:53:14,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:14,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:14,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701002751] [2021-06-12 19:53:14,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701002751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:14,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609483631] [2021-06-12 19:53:14,296 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 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 [2021-06-12 19:53:14,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:53:14,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:14,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:53:14,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:14,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609483631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:14,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:14,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:53:14,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388992561] [2021-06-12 19:53:14,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:53:14,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:14,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:53:14,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:53:14,601 INFO L87 Difference]: Start difference. First operand 91 states and 199 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) [2021-06-12 19:53:14,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:14,954 INFO L93 Difference]: Finished difference Result 107 states and 224 transitions. [2021-06-12 19:53:14,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:53:14,954 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 16 [2021-06-12 19:53:14,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:14,954 INFO L225 Difference]: With dead ends: 107 [2021-06-12 19:53:14,954 INFO L226 Difference]: Without dead ends: 100 [2021-06-12 19:53:14,955 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 632.1ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:53:14,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-12 19:53:14,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2021-06-12 19:53:14,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.204301075268817) internal successors, (205), 93 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:14,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 205 transitions. [2021-06-12 19:53:14,956 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 205 transitions. Word has length 16 [2021-06-12 19:53:14,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:14,956 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 205 transitions. [2021-06-12 19:53:14,956 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) [2021-06-12 19:53:14,956 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 205 transitions. [2021-06-12 19:53:14,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:14,957 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:14,957 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:15,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-12 19:53:15,165 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:15,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:15,165 INFO L82 PathProgramCache]: Analyzing trace with hash 576768767, now seen corresponding path program 53 times [2021-06-12 19:53:15,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:15,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090479378] [2021-06-12 19:53:15,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:15,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:15,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090479378] [2021-06-12 19:53:15,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090479378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:15,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174204667] [2021-06-12 19:53:15,323 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 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 [2021-06-12 19:53:15,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:15,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:15,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:53:15,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:15,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174204667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:15,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:15,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:53:15,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614823762] [2021-06-12 19:53:15,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:15,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:15,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:15,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:15,600 INFO L87 Difference]: Start difference. First operand 94 states and 205 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) [2021-06-12 19:53:16,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:16,230 INFO L93 Difference]: Finished difference Result 138 states and 276 transitions. [2021-06-12 19:53:16,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:53:16,231 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 16 [2021-06-12 19:53:16,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:16,231 INFO L225 Difference]: With dead ends: 138 [2021-06-12 19:53:16,231 INFO L226 Difference]: Without dead ends: 131 [2021-06-12 19:53:16,231 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 755.0ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:53:16,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-12 19:53:16,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 95. [2021-06-12 19:53:16,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.2127659574468086) internal successors, (208), 94 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:16,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 208 transitions. [2021-06-12 19:53:16,233 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 208 transitions. Word has length 16 [2021-06-12 19:53:16,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:16,233 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 208 transitions. [2021-06-12 19:53:16,234 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) [2021-06-12 19:53:16,234 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 208 transitions. [2021-06-12 19:53:16,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:16,234 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:16,234 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:16,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-06-12 19:53:16,449 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:16,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:16,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1911360097, now seen corresponding path program 54 times [2021-06-12 19:53:16,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:16,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977894814] [2021-06-12 19:53:16,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:16,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:16,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:16,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977894814] [2021-06-12 19:53:16,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977894814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:16,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156387460] [2021-06-12 19:53:16,590 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 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 [2021-06-12 19:53:16,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:53:16,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:16,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:53:16,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:16,818 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-06-12 19:53:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:16,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156387460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:16,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:16,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:53:16,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245309114] [2021-06-12 19:53:16,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:16,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:16,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:16,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:16,973 INFO L87 Difference]: Start difference. First operand 95 states and 208 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) [2021-06-12 19:53:17,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:17,428 INFO L93 Difference]: Finished difference Result 146 states and 288 transitions. [2021-06-12 19:53:17,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:53:17,428 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 16 [2021-06-12 19:53:17,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:17,429 INFO L225 Difference]: With dead ends: 146 [2021-06-12 19:53:17,429 INFO L226 Difference]: Without dead ends: 120 [2021-06-12 19:53:17,429 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 702.2ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:53:17,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-12 19:53:17,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 94. [2021-06-12 19:53:17,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.204301075268817) internal successors, (205), 93 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:17,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 205 transitions. [2021-06-12 19:53:17,431 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 205 transitions. Word has length 16 [2021-06-12 19:53:17,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:17,431 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 205 transitions. [2021-06-12 19:53:17,431 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) [2021-06-12 19:53:17,431 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 205 transitions. [2021-06-12 19:53:17,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:17,431 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:17,431 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:17,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-06-12 19:53:17,641 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:17,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:17,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1290310270, now seen corresponding path program 55 times [2021-06-12 19:53:17,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:17,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123600030] [2021-06-12 19:53:17,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:17,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:53:17,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:17,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123600030] [2021-06-12 19:53:17,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123600030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:17,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250739301] [2021-06-12 19:53:17,692 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 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 [2021-06-12 19:53:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:17,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:53:17,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:17,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:53:17,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250739301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:17,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:17,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:53:17,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64082145] [2021-06-12 19:53:17,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:53:17,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:17,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:53:17,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:53:17,819 INFO L87 Difference]: Start difference. First operand 94 states and 205 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) [2021-06-12 19:53:17,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:17,893 INFO L93 Difference]: Finished difference Result 112 states and 241 transitions. [2021-06-12 19:53:17,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:53:17,894 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 16 [2021-06-12 19:53:17,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:17,895 INFO L225 Difference]: With dead ends: 112 [2021-06-12 19:53:17,895 INFO L226 Difference]: Without dead ends: 112 [2021-06-12 19:53:17,895 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:53:17,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-12 19:53:17,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2021-06-12 19:53:17,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.2065217391304346) internal successors, (203), 92 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:17,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 203 transitions. [2021-06-12 19:53:17,904 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 203 transitions. Word has length 16 [2021-06-12 19:53:17,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:17,905 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 203 transitions. [2021-06-12 19:53:17,905 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) [2021-06-12 19:53:17,905 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 203 transitions. [2021-06-12 19:53:17,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:17,905 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:17,905 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:18,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:18,121 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:18,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:18,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1083115033, now seen corresponding path program 56 times [2021-06-12 19:53:18,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:18,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636475923] [2021-06-12 19:53:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:18,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:18,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636475923] [2021-06-12 19:53:18,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636475923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:18,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672768117] [2021-06-12 19:53:18,262 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 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 [2021-06-12 19:53:18,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:18,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:18,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:53:18,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:18,517 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-06-12 19:53:18,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:18,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672768117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:18,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:18,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:53:18,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729978315] [2021-06-12 19:53:18,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:18,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:18,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:18,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:18,637 INFO L87 Difference]: Start difference. First operand 93 states and 203 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) [2021-06-12 19:53:19,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:19,189 INFO L93 Difference]: Finished difference Result 152 states and 301 transitions. [2021-06-12 19:53:19,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:53:19,189 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 16 [2021-06-12 19:53:19,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:19,190 INFO L225 Difference]: With dead ends: 152 [2021-06-12 19:53:19,190 INFO L226 Difference]: Without dead ends: 132 [2021-06-12 19:53:19,190 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 778.6ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:53:19,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-06-12 19:53:19,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 98. [2021-06-12 19:53:19,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.2061855670103094) internal successors, (214), 97 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:19,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 214 transitions. [2021-06-12 19:53:19,192 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 214 transitions. Word has length 16 [2021-06-12 19:53:19,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:19,192 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 214 transitions. [2021-06-12 19:53:19,192 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) [2021-06-12 19:53:19,192 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 214 transitions. [2021-06-12 19:53:19,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:19,192 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:19,192 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:19,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:19,405 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:19,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:19,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1877260933, now seen corresponding path program 57 times [2021-06-12 19:53:19,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:19,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955033474] [2021-06-12 19:53:19,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:19,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:19,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955033474] [2021-06-12 19:53:19,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955033474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:19,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822068183] [2021-06-12 19:53:19,531 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 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 [2021-06-12 19:53:19,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:53:19,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:19,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:53:19,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:19,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:19,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822068183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:19,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:19,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:53:19,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90888659] [2021-06-12 19:53:19,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:19,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:19,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:19,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:19,859 INFO L87 Difference]: Start difference. First operand 98 states and 214 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) [2021-06-12 19:53:20,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:20,291 INFO L93 Difference]: Finished difference Result 148 states and 293 transitions. [2021-06-12 19:53:20,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:53:20,291 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 16 [2021-06-12 19:53:20,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:20,291 INFO L225 Difference]: With dead ends: 148 [2021-06-12 19:53:20,292 INFO L226 Difference]: Without dead ends: 127 [2021-06-12 19:53:20,292 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 610.4ms TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:53:20,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-12 19:53:20,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 97. [2021-06-12 19:53:20,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.2083333333333335) internal successors, (212), 96 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:20,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 212 transitions. [2021-06-12 19:53:20,294 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 212 transitions. Word has length 16 [2021-06-12 19:53:20,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:20,294 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 212 transitions. [2021-06-12 19:53:20,294 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) [2021-06-12 19:53:20,294 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 212 transitions. [2021-06-12 19:53:20,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:20,294 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:20,294 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:20,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:20,497 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:20,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:20,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1879850785, now seen corresponding path program 58 times [2021-06-12 19:53:20,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:20,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634901102] [2021-06-12 19:53:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:20,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:20,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634901102] [2021-06-12 19:53:20,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634901102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:20,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887161939] [2021-06-12 19:53:20,617 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 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 [2021-06-12 19:53:20,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:53:20,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:20,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:53:20,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:20,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887161939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:20,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:20,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:53:20,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651384887] [2021-06-12 19:53:20,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:20,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:20,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:20,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:20,983 INFO L87 Difference]: Start difference. First operand 97 states and 212 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) [2021-06-12 19:53:21,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:21,643 INFO L93 Difference]: Finished difference Result 171 states and 342 transitions. [2021-06-12 19:53:21,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:53:21,643 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 16 [2021-06-12 19:53:21,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:21,644 INFO L225 Difference]: With dead ends: 171 [2021-06-12 19:53:21,644 INFO L226 Difference]: Without dead ends: 145 [2021-06-12 19:53:21,644 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 776.2ms TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:53:21,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-12 19:53:21,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 100. [2021-06-12 19:53:21,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.2323232323232323) internal successors, (221), 99 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:21,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 221 transitions. [2021-06-12 19:53:21,646 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 221 transitions. Word has length 16 [2021-06-12 19:53:21,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:21,646 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 221 transitions. [2021-06-12 19:53:21,646 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) [2021-06-12 19:53:21,647 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 221 transitions. [2021-06-12 19:53:21,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:21,647 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:21,647 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:21,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-06-12 19:53:21,870 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:21,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:21,870 INFO L82 PathProgramCache]: Analyzing trace with hash -400019905, now seen corresponding path program 59 times [2021-06-12 19:53:21,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:21,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12508009] [2021-06-12 19:53:21,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:22,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:22,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12508009] [2021-06-12 19:53:22,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12508009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:22,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495190829] [2021-06-12 19:53:22,079 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 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 [2021-06-12 19:53:22,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:53:22,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:22,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:53:22,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:22,344 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-06-12 19:53:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:22,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495190829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:22,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:22,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:53:22,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769439622] [2021-06-12 19:53:22,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:22,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:22,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:22,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:22,474 INFO L87 Difference]: Start difference. First operand 100 states and 221 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) [2021-06-12 19:53:22,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:22,861 INFO L93 Difference]: Finished difference Result 131 states and 273 transitions. [2021-06-12 19:53:22,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:53:22,861 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 16 [2021-06-12 19:53:22,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:22,861 INFO L225 Difference]: With dead ends: 131 [2021-06-12 19:53:22,861 INFO L226 Difference]: Without dead ends: 120 [2021-06-12 19:53:22,862 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 682.8ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:53:22,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-12 19:53:22,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2021-06-12 19:53:22,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.227722772277228) internal successors, (225), 101 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:22,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 225 transitions. [2021-06-12 19:53:22,863 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 225 transitions. Word has length 16 [2021-06-12 19:53:22,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:22,863 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 225 transitions. [2021-06-12 19:53:22,863 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) [2021-06-12 19:53:22,863 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 225 transitions. [2021-06-12 19:53:22,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:22,864 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:22,864 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:23,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:23,069 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:23,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:23,069 INFO L82 PathProgramCache]: Analyzing trace with hash 934571425, now seen corresponding path program 60 times [2021-06-12 19:53:23,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:23,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582976389] [2021-06-12 19:53:23,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:23,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:23,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582976389] [2021-06-12 19:53:23,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582976389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:23,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587243356] [2021-06-12 19:53:23,250 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 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 [2021-06-12 19:53:23,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:53:23,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:23,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:53:23,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:23,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587243356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:23,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:23,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:53:23,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808058039] [2021-06-12 19:53:23,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:23,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:23,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:23,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:23,508 INFO L87 Difference]: Start difference. First operand 102 states and 225 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) [2021-06-12 19:53:24,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:24,164 INFO L93 Difference]: Finished difference Result 178 states and 347 transitions. [2021-06-12 19:53:24,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:53:24,165 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 16 [2021-06-12 19:53:24,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:24,165 INFO L225 Difference]: With dead ends: 178 [2021-06-12 19:53:24,165 INFO L226 Difference]: Without dead ends: 159 [2021-06-12 19:53:24,166 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 790.2ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:53:24,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-12 19:53:24,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 104. [2021-06-12 19:53:24,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.2427184466019416) internal successors, (231), 103 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 231 transitions. [2021-06-12 19:53:24,168 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 231 transitions. Word has length 16 [2021-06-12 19:53:24,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:24,168 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 231 transitions. [2021-06-12 19:53:24,168 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) [2021-06-12 19:53:24,168 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 231 transitions. [2021-06-12 19:53:24,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:24,168 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:24,168 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:24,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-12 19:53:24,389 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:24,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:24,389 INFO L82 PathProgramCache]: Analyzing trace with hash 396715847, now seen corresponding path program 61 times [2021-06-12 19:53:24,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:24,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013059425] [2021-06-12 19:53:24,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:24,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:24,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013059425] [2021-06-12 19:53:24,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013059425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:24,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712527396] [2021-06-12 19:53:24,509 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 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 [2021-06-12 19:53:24,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:24,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:53:24,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:24,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712527396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:24,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:24,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:53:24,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088868965] [2021-06-12 19:53:24,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:24,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:24,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:24,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:24,875 INFO L87 Difference]: Start difference. First operand 104 states and 231 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) [2021-06-12 19:53:25,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:25,484 INFO L93 Difference]: Finished difference Result 161 states and 329 transitions. [2021-06-12 19:53:25,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:53:25,485 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 16 [2021-06-12 19:53:25,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:25,485 INFO L225 Difference]: With dead ends: 161 [2021-06-12 19:53:25,485 INFO L226 Difference]: Without dead ends: 132 [2021-06-12 19:53:25,485 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 772.0ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:53:25,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-06-12 19:53:25,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 107. [2021-06-12 19:53:25,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.2641509433962264) internal successors, (240), 106 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:25,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 240 transitions. [2021-06-12 19:53:25,487 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 240 transitions. Word has length 16 [2021-06-12 19:53:25,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:25,487 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 240 transitions. [2021-06-12 19:53:25,487 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) [2021-06-12 19:53:25,487 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 240 transitions. [2021-06-12 19:53:25,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:25,487 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:25,487 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:25,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:25,688 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:25,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:25,689 INFO L82 PathProgramCache]: Analyzing trace with hash 189520610, now seen corresponding path program 62 times [2021-06-12 19:53:25,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:25,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690351449] [2021-06-12 19:53:25,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:25,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:53:25,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:25,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690351449] [2021-06-12 19:53:25,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690351449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:25,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4713215] [2021-06-12 19:53:25,733 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 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 [2021-06-12 19:53:25,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:25,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:25,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:53:25,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:53:25,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4713215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:25,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:25,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:53:25,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695387235] [2021-06-12 19:53:25,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:53:25,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:25,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:53:25,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:53:25,858 INFO L87 Difference]: Start difference. First operand 107 states and 240 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) [2021-06-12 19:53:25,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:25,991 INFO L93 Difference]: Finished difference Result 163 states and 332 transitions. [2021-06-12 19:53:25,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:53:25,991 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 16 [2021-06-12 19:53:25,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:25,992 INFO L225 Difference]: With dead ends: 163 [2021-06-12 19:53:25,992 INFO L226 Difference]: Without dead ends: 163 [2021-06-12 19:53:25,992 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:53:25,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-12 19:53:25,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 110. [2021-06-12 19:53:25,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.293577981651376) internal successors, (250), 109 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:25,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 250 transitions. [2021-06-12 19:53:25,994 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 250 transitions. Word has length 16 [2021-06-12 19:53:25,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:25,994 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 250 transitions. [2021-06-12 19:53:25,994 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) [2021-06-12 19:53:25,994 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 250 transitions. [2021-06-12 19:53:25,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:25,995 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:25,995 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:26,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-06-12 19:53:26,205 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:26,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:26,205 INFO L82 PathProgramCache]: Analyzing trace with hash 903062113, now seen corresponding path program 63 times [2021-06-12 19:53:26,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:26,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078500577] [2021-06-12 19:53:26,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:26,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:26,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078500577] [2021-06-12 19:53:26,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078500577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:26,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884328684] [2021-06-12 19:53:26,325 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 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 [2021-06-12 19:53:26,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:53:26,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:26,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:53:26,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:26,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884328684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:26,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:26,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:53:26,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738403674] [2021-06-12 19:53:26,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:26,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:26,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:26,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:26,687 INFO L87 Difference]: Start difference. First operand 110 states and 250 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) [2021-06-12 19:53:28,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:28,180 INFO L93 Difference]: Finished difference Result 219 states and 429 transitions. [2021-06-12 19:53:28,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:53:28,181 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 16 [2021-06-12 19:53:28,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:28,181 INFO L225 Difference]: With dead ends: 219 [2021-06-12 19:53:28,181 INFO L226 Difference]: Without dead ends: 151 [2021-06-12 19:53:28,181 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1620.9ms TimeCoverageRelationStatistics Valid=348, Invalid=1134, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:53:28,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-12 19:53:28,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 115. [2021-06-12 19:53:28,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.280701754385965) internal successors, (260), 114 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:28,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 260 transitions. [2021-06-12 19:53:28,183 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 260 transitions. Word has length 16 [2021-06-12 19:53:28,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:28,184 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 260 transitions. [2021-06-12 19:53:28,184 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) [2021-06-12 19:53:28,184 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 260 transitions. [2021-06-12 19:53:28,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:28,184 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:28,184 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:28,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-12 19:53:28,401 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:28,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:28,401 INFO L82 PathProgramCache]: Analyzing trace with hash 695866876, now seen corresponding path program 64 times [2021-06-12 19:53:28,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:28,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193326424] [2021-06-12 19:53:28,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:53:28,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:28,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193326424] [2021-06-12 19:53:28,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193326424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:28,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504775871] [2021-06-12 19:53:28,447 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 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 [2021-06-12 19:53:28,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:53:28,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:28,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:53:28,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:53:28,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504775871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:28,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:28,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:53:28,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649878395] [2021-06-12 19:53:28,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:53:28,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:28,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:53:28,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:53:28,559 INFO L87 Difference]: Start difference. First operand 115 states and 260 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) [2021-06-12 19:53:28,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:28,602 INFO L93 Difference]: Finished difference Result 127 states and 279 transitions. [2021-06-12 19:53:28,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:53:28,602 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 16 [2021-06-12 19:53:28,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:28,603 INFO L225 Difference]: With dead ends: 127 [2021-06-12 19:53:28,603 INFO L226 Difference]: Without dead ends: 127 [2021-06-12 19:53:28,603 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:53:28,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-12 19:53:28,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 113. [2021-06-12 19:53:28,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.25) internal successors, (252), 112 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:28,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 252 transitions. [2021-06-12 19:53:28,605 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 252 transitions. Word has length 16 [2021-06-12 19:53:28,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:28,605 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 252 transitions. [2021-06-12 19:53:28,605 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) [2021-06-12 19:53:28,605 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 252 transitions. [2021-06-12 19:53:28,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:28,606 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:28,606 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:28,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-12 19:53:28,821 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:28,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:28,821 INFO L82 PathProgramCache]: Analyzing trace with hash 444951547, now seen corresponding path program 65 times [2021-06-12 19:53:28,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:28,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50017747] [2021-06-12 19:53:28,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:29,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:29,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50017747] [2021-06-12 19:53:29,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50017747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:29,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51017186] [2021-06-12 19:53:29,074 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 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 [2021-06-12 19:53:29,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:53:29,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:29,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:53:29,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:29,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51017186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:29,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:29,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:53:29,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861475584] [2021-06-12 19:53:29,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:29,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:29,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:29,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:29,407 INFO L87 Difference]: Start difference. First operand 113 states and 252 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) [2021-06-12 19:53:29,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:29,702 INFO L93 Difference]: Finished difference Result 149 states and 313 transitions. [2021-06-12 19:53:29,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:53:29,702 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 16 [2021-06-12 19:53:29,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:29,703 INFO L225 Difference]: With dead ends: 149 [2021-06-12 19:53:29,703 INFO L226 Difference]: Without dead ends: 138 [2021-06-12 19:53:29,703 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 629.3ms TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:53:29,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-12 19:53:29,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 115. [2021-06-12 19:53:29,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.245614035087719) internal successors, (256), 114 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:29,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 256 transitions. [2021-06-12 19:53:29,705 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 256 transitions. Word has length 16 [2021-06-12 19:53:29,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:29,705 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 256 transitions. [2021-06-12 19:53:29,705 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) [2021-06-12 19:53:29,705 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 256 transitions. [2021-06-12 19:53:29,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:29,706 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:29,706 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:29,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-12 19:53:29,921 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:29,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:29,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1779542877, now seen corresponding path program 66 times [2021-06-12 19:53:29,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:29,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604832060] [2021-06-12 19:53:29,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:30,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:30,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:30,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604832060] [2021-06-12 19:53:30,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604832060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:30,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980169861] [2021-06-12 19:53:30,121 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 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 [2021-06-12 19:53:30,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:53:30,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:30,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:53:30,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:30,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980169861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:30,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:30,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:53:30,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273270583] [2021-06-12 19:53:30,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:30,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:30,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:30,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:30,490 INFO L87 Difference]: Start difference. First operand 115 states and 256 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) [2021-06-12 19:53:30,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:30,883 INFO L93 Difference]: Finished difference Result 160 states and 331 transitions. [2021-06-12 19:53:30,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:53:30,883 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 16 [2021-06-12 19:53:30,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:30,884 INFO L225 Difference]: With dead ends: 160 [2021-06-12 19:53:30,884 INFO L226 Difference]: Without dead ends: 141 [2021-06-12 19:53:30,884 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 644.2ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:53:30,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-12 19:53:30,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 114. [2021-06-12 19:53:30,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.247787610619469) internal successors, (254), 113 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:30,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 254 transitions. [2021-06-12 19:53:30,886 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 254 transitions. Word has length 16 [2021-06-12 19:53:30,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:30,887 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 254 transitions. [2021-06-12 19:53:30,887 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) [2021-06-12 19:53:30,887 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 254 transitions. [2021-06-12 19:53:30,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:30,887 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:30,887 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:31,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-12 19:53:31,097 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:31,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:31,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1241687299, now seen corresponding path program 67 times [2021-06-12 19:53:31,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:31,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742705538] [2021-06-12 19:53:31,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:31,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:31,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742705538] [2021-06-12 19:53:31,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742705538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:31,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702314670] [2021-06-12 19:53:31,254 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 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 [2021-06-12 19:53:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:31,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:53:31,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:31,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702314670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:31,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:31,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:53:31,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198233906] [2021-06-12 19:53:31,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:31,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:31,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:31,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:31,633 INFO L87 Difference]: Start difference. First operand 114 states and 254 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) [2021-06-12 19:53:32,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:32,231 INFO L93 Difference]: Finished difference Result 167 states and 349 transitions. [2021-06-12 19:53:32,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:53:32,232 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 16 [2021-06-12 19:53:32,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:32,232 INFO L225 Difference]: With dead ends: 167 [2021-06-12 19:53:32,232 INFO L226 Difference]: Without dead ends: 145 [2021-06-12 19:53:32,232 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 791.0ms TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:53:32,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-12 19:53:32,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 114. [2021-06-12 19:53:32,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.247787610619469) internal successors, (254), 113 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:32,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 254 transitions. [2021-06-12 19:53:32,235 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 254 transitions. Word has length 16 [2021-06-12 19:53:32,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:32,235 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 254 transitions. [2021-06-12 19:53:32,235 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) [2021-06-12 19:53:32,235 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 254 transitions. [2021-06-12 19:53:32,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:32,235 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:32,235 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:32,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:32,436 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:32,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:32,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1748033565, now seen corresponding path program 68 times [2021-06-12 19:53:32,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:32,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429396851] [2021-06-12 19:53:32,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:32,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:32,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:32,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429396851] [2021-06-12 19:53:32,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429396851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:32,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360597126] [2021-06-12 19:53:32,559 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 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 [2021-06-12 19:53:32,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:32,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:32,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:53:32,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:32,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360597126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:32,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:32,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:53:32,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298550883] [2021-06-12 19:53:32,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:32,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:32,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:32,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:32,890 INFO L87 Difference]: Start difference. First operand 114 states and 254 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) [2021-06-12 19:53:33,553 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2021-06-12 19:53:33,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:33,624 INFO L93 Difference]: Finished difference Result 201 states and 395 transitions. [2021-06-12 19:53:33,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:53:33,625 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 16 [2021-06-12 19:53:33,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:33,625 INFO L225 Difference]: With dead ends: 201 [2021-06-12 19:53:33,625 INFO L226 Difference]: Without dead ends: 166 [2021-06-12 19:53:33,625 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 866.8ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:53:33,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-12 19:53:33,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 114. [2021-06-12 19:53:33,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.247787610619469) internal successors, (254), 113 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:33,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 254 transitions. [2021-06-12 19:53:33,627 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 254 transitions. Word has length 16 [2021-06-12 19:53:33,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:33,627 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 254 transitions. [2021-06-12 19:53:33,627 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) [2021-06-12 19:53:33,627 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 254 transitions. [2021-06-12 19:53:33,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:33,627 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:33,627 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:33,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:33,828 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:33,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:33,828 INFO L82 PathProgramCache]: Analyzing trace with hash -2104034591, now seen corresponding path program 69 times [2021-06-12 19:53:33,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:33,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435472426] [2021-06-12 19:53:33,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:33,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:33,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435472426] [2021-06-12 19:53:33,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435472426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:33,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325540423] [2021-06-12 19:53:33,964 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 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 [2021-06-12 19:53:34,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:53:34,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:34,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:53:34,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:34,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325540423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:34,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:34,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:53:34,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986266617] [2021-06-12 19:53:34,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:34,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:34,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:34,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:34,365 INFO L87 Difference]: Start difference. First operand 114 states and 254 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) [2021-06-12 19:53:34,877 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-06-12 19:53:35,183 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2021-06-12 19:53:35,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:35,209 INFO L93 Difference]: Finished difference Result 187 states and 386 transitions. [2021-06-12 19:53:35,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:53:35,209 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 16 [2021-06-12 19:53:35,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:35,210 INFO L225 Difference]: With dead ends: 187 [2021-06-12 19:53:35,210 INFO L226 Difference]: Without dead ends: 156 [2021-06-12 19:53:35,210 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1068.2ms TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:53:35,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-12 19:53:35,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 117. [2021-06-12 19:53:35,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.2413793103448274) internal successors, (260), 116 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:35,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 260 transitions. [2021-06-12 19:53:35,212 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 260 transitions. Word has length 16 [2021-06-12 19:53:35,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:35,212 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 260 transitions. [2021-06-12 19:53:35,212 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) [2021-06-12 19:53:35,212 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 260 transitions. [2021-06-12 19:53:35,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:35,213 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:35,213 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:35,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:35,433 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:35,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:35,433 INFO L82 PathProgramCache]: Analyzing trace with hash -570507776, now seen corresponding path program 70 times [2021-06-12 19:53:35,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:35,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066330761] [2021-06-12 19:53:35,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:35,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:35,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066330761] [2021-06-12 19:53:35,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066330761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:35,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306481832] [2021-06-12 19:53:35,498 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 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 [2021-06-12 19:53:35,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:53:35,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:35,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:35,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:35,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:35,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306481832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:35,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:35,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 19:53:35,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941662891] [2021-06-12 19:53:35,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:53:35,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:35,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:53:35,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:53:35,612 INFO L87 Difference]: Start difference. First operand 117 states and 260 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) [2021-06-12 19:53:35,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:35,689 INFO L93 Difference]: Finished difference Result 159 states and 338 transitions. [2021-06-12 19:53:35,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:53:35,689 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 [2021-06-12 19:53:35,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:35,690 INFO L225 Difference]: With dead ends: 159 [2021-06-12 19:53:35,690 INFO L226 Difference]: Without dead ends: 159 [2021-06-12 19:53:35,690 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:35,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-12 19:53:35,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2021-06-12 19:53:35,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.247863247863248) internal successors, (263), 117 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:35,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-06-12 19:53:35,692 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-06-12 19:53:35,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:35,692 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-06-12 19:53:35,692 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) [2021-06-12 19:53:35,693 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-06-12 19:53:35,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:35,693 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:35,693 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:35,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable483 [2021-06-12 19:53:35,905 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:35,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:35,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1010264140, now seen corresponding path program 71 times [2021-06-12 19:53:35,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:35,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629288946] [2021-06-12 19:53:35,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:36,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:36,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629288946] [2021-06-12 19:53:36,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629288946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:36,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469855534] [2021-06-12 19:53:36,004 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 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 [2021-06-12 19:53:36,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:53:36,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:36,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:36,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:36,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:36,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469855534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:36,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:36,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:53:36,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81318890] [2021-06-12 19:53:36,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:53:36,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:36,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:53:36,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:53:36,181 INFO L87 Difference]: Start difference. First operand 118 states and 263 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) [2021-06-12 19:53:36,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:36,495 INFO L93 Difference]: Finished difference Result 174 states and 368 transitions. [2021-06-12 19:53:36,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:53:36,495 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 17 [2021-06-12 19:53:36,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:36,496 INFO L225 Difference]: With dead ends: 174 [2021-06-12 19:53:36,496 INFO L226 Difference]: Without dead ends: 174 [2021-06-12 19:53:36,496 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 384.9ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:53:36,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-12 19:53:36,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 118. [2021-06-12 19:53:36,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.247863247863248) internal successors, (263), 117 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:36,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-06-12 19:53:36,497 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-06-12 19:53:36,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:36,498 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-06-12 19:53:36,498 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) [2021-06-12 19:53:36,498 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-06-12 19:53:36,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:36,498 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:36,498 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:36,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-12 19:53:36,713 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:36,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:36,713 INFO L82 PathProgramCache]: Analyzing trace with hash -60731324, now seen corresponding path program 72 times [2021-06-12 19:53:36,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:36,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840300960] [2021-06-12 19:53:36,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:36,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:36,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:36,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840300960] [2021-06-12 19:53:36,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840300960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:36,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374402788] [2021-06-12 19:53:36,800 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 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 [2021-06-12 19:53:36,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:53:36,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:36,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:36,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:36,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374402788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:36,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:36,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:36,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440587438] [2021-06-12 19:53:36,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:36,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:36,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:36,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:36,995 INFO L87 Difference]: Start difference. First operand 118 states and 263 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) [2021-06-12 19:53:37,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:37,217 INFO L93 Difference]: Finished difference Result 168 states and 356 transitions. [2021-06-12 19:53:37,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:53:37,217 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 [2021-06-12 19:53:37,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:37,218 INFO L225 Difference]: With dead ends: 168 [2021-06-12 19:53:37,218 INFO L226 Difference]: Without dead ends: 168 [2021-06-12 19:53:37,218 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 261.9ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:53:37,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-12 19:53:37,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 118. [2021-06-12 19:53:37,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.247863247863248) internal successors, (263), 117 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:37,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-06-12 19:53:37,221 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-06-12 19:53:37,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:37,221 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-06-12 19:53:37,221 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) [2021-06-12 19:53:37,221 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-06-12 19:53:37,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:37,221 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:37,221 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:37,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-12 19:53:37,422 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:37,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:37,422 INFO L82 PathProgramCache]: Analyzing trace with hash 736004428, now seen corresponding path program 73 times [2021-06-12 19:53:37,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:37,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173532956] [2021-06-12 19:53:37,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:37,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:37,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173532956] [2021-06-12 19:53:37,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173532956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:37,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943463431] [2021-06-12 19:53:37,497 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 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 [2021-06-12 19:53:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:37,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:37,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:37,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:37,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943463431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:37,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:37,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:37,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17397871] [2021-06-12 19:53:37,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:37,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:37,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:37,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:37,643 INFO L87 Difference]: Start difference. First operand 118 states and 263 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) [2021-06-12 19:53:37,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:37,868 INFO L93 Difference]: Finished difference Result 170 states and 355 transitions. [2021-06-12 19:53:37,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:53:37,868 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 [2021-06-12 19:53:37,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:37,869 INFO L225 Difference]: With dead ends: 170 [2021-06-12 19:53:37,869 INFO L226 Difference]: Without dead ends: 167 [2021-06-12 19:53:37,869 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 262.9ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:53:37,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-12 19:53:37,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 118. [2021-06-12 19:53:37,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.247863247863248) internal successors, (263), 117 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:37,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-06-12 19:53:37,871 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-06-12 19:53:37,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:37,872 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-06-12 19:53:37,872 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) [2021-06-12 19:53:37,872 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-06-12 19:53:37,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:37,872 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:37,872 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:38,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:38,073 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:38,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:38,073 INFO L82 PathProgramCache]: Analyzing trace with hash 528809191, now seen corresponding path program 74 times [2021-06-12 19:53:38,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:38,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372915441] [2021-06-12 19:53:38,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:38,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:38,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372915441] [2021-06-12 19:53:38,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372915441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:38,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101575474] [2021-06-12 19:53:38,149 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 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 [2021-06-12 19:53:38,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:38,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:38,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:38,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:38,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101575474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:38,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:38,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:38,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624031513] [2021-06-12 19:53:38,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:38,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:38,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:38,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:38,383 INFO L87 Difference]: Start difference. First operand 118 states and 263 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) [2021-06-12 19:53:38,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:38,593 INFO L93 Difference]: Finished difference Result 170 states and 351 transitions. [2021-06-12 19:53:38,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:53:38,594 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 [2021-06-12 19:53:38,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:38,594 INFO L225 Difference]: With dead ends: 170 [2021-06-12 19:53:38,594 INFO L226 Difference]: Without dead ends: 168 [2021-06-12 19:53:38,594 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 357.8ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:53:38,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-12 19:53:38,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 122. [2021-06-12 19:53:38,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.2479338842975207) internal successors, (272), 121 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:38,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 272 transitions. [2021-06-12 19:53:38,596 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 272 transitions. Word has length 17 [2021-06-12 19:53:38,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:38,596 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 272 transitions. [2021-06-12 19:53:38,596 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) [2021-06-12 19:53:38,596 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 272 transitions. [2021-06-12 19:53:38,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:38,596 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:38,597 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:38,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-12 19:53:38,797 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:38,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:38,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1863400521, now seen corresponding path program 75 times [2021-06-12 19:53:38,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:38,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024995866] [2021-06-12 19:53:38,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:38,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:38,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024995866] [2021-06-12 19:53:38,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024995866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:38,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323600653] [2021-06-12 19:53:38,877 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 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 [2021-06-12 19:53:38,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:53:38,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:38,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:38,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:39,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323600653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:39,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:39,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:39,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273569555] [2021-06-12 19:53:39,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:39,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:39,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:39,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:39,121 INFO L87 Difference]: Start difference. First operand 122 states and 272 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) [2021-06-12 19:53:39,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:39,288 INFO L93 Difference]: Finished difference Result 157 states and 332 transitions. [2021-06-12 19:53:39,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:53:39,289 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 [2021-06-12 19:53:39,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:39,289 INFO L225 Difference]: With dead ends: 157 [2021-06-12 19:53:39,289 INFO L226 Difference]: Without dead ends: 157 [2021-06-12 19:53:39,289 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 309.0ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:39,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-12 19:53:39,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 118. [2021-06-12 19:53:39,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.247863247863248) internal successors, (263), 117 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:39,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-06-12 19:53:39,292 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-06-12 19:53:39,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:39,292 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-06-12 19:53:39,292 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) [2021-06-12 19:53:39,292 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-06-12 19:53:39,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:39,292 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:39,292 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:39,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:39,493 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:39,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:39,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1172274526, now seen corresponding path program 76 times [2021-06-12 19:53:39,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:39,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155607902] [2021-06-12 19:53:39,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:39,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:39,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155607902] [2021-06-12 19:53:39,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155607902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:39,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549241898] [2021-06-12 19:53:39,590 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 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 [2021-06-12 19:53:39,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:53:39,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:39,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:39,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:39,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549241898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:39,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:39,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:53:39,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158014028] [2021-06-12 19:53:39,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:53:39,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:39,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:53:39,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:53:39,769 INFO L87 Difference]: Start difference. First operand 118 states and 263 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) [2021-06-12 19:53:39,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:39,950 INFO L93 Difference]: Finished difference Result 138 states and 301 transitions. [2021-06-12 19:53:39,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:53:39,950 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 17 [2021-06-12 19:53:39,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:39,951 INFO L225 Difference]: With dead ends: 138 [2021-06-12 19:53:39,951 INFO L226 Difference]: Without dead ends: 138 [2021-06-12 19:53:39,951 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 274.6ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:53:39,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-12 19:53:39,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 118. [2021-06-12 19:53:39,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.247863247863248) internal successors, (263), 117 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:39,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-06-12 19:53:39,952 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-06-12 19:53:39,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:39,952 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-06-12 19:53:39,952 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) [2021-06-12 19:53:39,952 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-06-12 19:53:39,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:39,953 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:39,953 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:40,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-06-12 19:53:40,157 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:40,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:40,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2051697306, now seen corresponding path program 77 times [2021-06-12 19:53:40,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:40,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786041538] [2021-06-12 19:53:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:40,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:40,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786041538] [2021-06-12 19:53:40,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786041538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:40,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145597996] [2021-06-12 19:53:40,233 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 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 [2021-06-12 19:53:40,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:53:40,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:40,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:40,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:40,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:40,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145597996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:40,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:40,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:40,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990393540] [2021-06-12 19:53:40,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:40,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:40,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:40,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:40,380 INFO L87 Difference]: Start difference. First operand 118 states and 263 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) [2021-06-12 19:53:40,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:40,476 INFO L93 Difference]: Finished difference Result 148 states and 321 transitions. [2021-06-12 19:53:40,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:53:40,477 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 [2021-06-12 19:53:40,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:40,477 INFO L225 Difference]: With dead ends: 148 [2021-06-12 19:53:40,477 INFO L226 Difference]: Without dead ends: 148 [2021-06-12 19:53:40,478 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 140.0ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:40,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-12 19:53:40,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 119. [2021-06-12 19:53:40,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.2457627118644066) internal successors, (265), 118 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 265 transitions. [2021-06-12 19:53:40,479 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 265 transitions. Word has length 17 [2021-06-12 19:53:40,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:40,479 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 265 transitions. [2021-06-12 19:53:40,479 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) [2021-06-12 19:53:40,479 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 265 transitions. [2021-06-12 19:53:40,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:40,479 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:40,480 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:40,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-12 19:53:40,680 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:40,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:40,681 INFO L82 PathProgramCache]: Analyzing trace with hash -319138145, now seen corresponding path program 78 times [2021-06-12 19:53:40,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:40,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606616124] [2021-06-12 19:53:40,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:40,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:40,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606616124] [2021-06-12 19:53:40,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606616124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:40,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192605858] [2021-06-12 19:53:40,762 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 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 [2021-06-12 19:53:40,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:53:40,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:40,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:40,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:41,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192605858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:41,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:41,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:41,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078373977] [2021-06-12 19:53:41,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:41,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:41,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:41,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:41,032 INFO L87 Difference]: Start difference. First operand 119 states and 265 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) [2021-06-12 19:53:41,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:41,112 INFO L93 Difference]: Finished difference Result 135 states and 295 transitions. [2021-06-12 19:53:41,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:53:41,113 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 [2021-06-12 19:53:41,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:41,113 INFO L225 Difference]: With dead ends: 135 [2021-06-12 19:53:41,113 INFO L226 Difference]: Without dead ends: 135 [2021-06-12 19:53:41,114 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 256.2ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:41,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-12 19:53:41,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 120. [2021-06-12 19:53:41,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2436974789915967) internal successors, (267), 119 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:41,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 267 transitions. [2021-06-12 19:53:41,116 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 267 transitions. Word has length 17 [2021-06-12 19:53:41,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:41,116 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 267 transitions. [2021-06-12 19:53:41,116 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) [2021-06-12 19:53:41,116 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 267 transitions. [2021-06-12 19:53:41,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:41,116 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:41,116 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:41,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:41,317 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:41,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:41,317 INFO L82 PathProgramCache]: Analyzing trace with hash 568562368, now seen corresponding path program 79 times [2021-06-12 19:53:41,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:41,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187430810] [2021-06-12 19:53:41,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:41,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:41,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187430810] [2021-06-12 19:53:41,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187430810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:41,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122210292] [2021-06-12 19:53:41,437 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 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 [2021-06-12 19:53:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:41,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:41,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:41,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:41,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122210292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:41,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:41,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:41,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792081123] [2021-06-12 19:53:41,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:41,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:41,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:41,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:41,615 INFO L87 Difference]: Start difference. First operand 120 states and 267 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) [2021-06-12 19:53:41,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:41,763 INFO L93 Difference]: Finished difference Result 146 states and 317 transitions. [2021-06-12 19:53:41,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:53:41,764 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 [2021-06-12 19:53:41,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:41,765 INFO L225 Difference]: With dead ends: 146 [2021-06-12 19:53:41,765 INFO L226 Difference]: Without dead ends: 146 [2021-06-12 19:53:41,765 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 240.5ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:53:41,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-12 19:53:41,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2021-06-12 19:53:41,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2436974789915967) internal successors, (267), 119 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:41,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 267 transitions. [2021-06-12 19:53:41,767 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 267 transitions. Word has length 17 [2021-06-12 19:53:41,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:41,767 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 267 transitions. [2021-06-12 19:53:41,767 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) [2021-06-12 19:53:41,767 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 267 transitions. [2021-06-12 19:53:41,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:41,768 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:41,768 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:41,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:41,981 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:41,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:41,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1365298120, now seen corresponding path program 80 times [2021-06-12 19:53:41,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:41,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828331730] [2021-06-12 19:53:41,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:42,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:42,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828331730] [2021-06-12 19:53:42,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828331730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:42,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594715401] [2021-06-12 19:53:42,091 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 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 [2021-06-12 19:53:42,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:42,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:42,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:42,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:42,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:42,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594715401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:42,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:42,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:42,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583941665] [2021-06-12 19:53:42,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:42,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:42,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:42,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:42,254 INFO L87 Difference]: Start difference. First operand 120 states and 267 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) [2021-06-12 19:53:42,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:42,418 INFO L93 Difference]: Finished difference Result 146 states and 317 transitions. [2021-06-12 19:53:42,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:53:42,418 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 [2021-06-12 19:53:42,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:42,419 INFO L225 Difference]: With dead ends: 146 [2021-06-12 19:53:42,419 INFO L226 Difference]: Without dead ends: 146 [2021-06-12 19:53:42,419 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 224.9ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:42,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-12 19:53:42,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2021-06-12 19:53:42,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2436974789915967) internal successors, (267), 119 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:42,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 267 transitions. [2021-06-12 19:53:42,420 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 267 transitions. Word has length 17 [2021-06-12 19:53:42,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:42,420 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 267 transitions. [2021-06-12 19:53:42,421 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) [2021-06-12 19:53:42,421 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 267 transitions. [2021-06-12 19:53:42,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:42,422 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:42,422 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:42,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-06-12 19:53:42,641 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:42,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:42,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1652848355, now seen corresponding path program 81 times [2021-06-12 19:53:42,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:42,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897585644] [2021-06-12 19:53:42,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:42,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:42,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897585644] [2021-06-12 19:53:42,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897585644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:42,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718521665] [2021-06-12 19:53:42,726 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 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 [2021-06-12 19:53:42,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:53:42,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:42,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:42,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:42,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:42,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718521665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:42,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:42,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:42,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500366890] [2021-06-12 19:53:42,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:42,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:42,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:42,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:42,968 INFO L87 Difference]: Start difference. First operand 120 states and 267 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) [2021-06-12 19:53:43,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:43,141 INFO L93 Difference]: Finished difference Result 143 states and 310 transitions. [2021-06-12 19:53:43,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:53:43,141 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 [2021-06-12 19:53:43,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:43,141 INFO L225 Difference]: With dead ends: 143 [2021-06-12 19:53:43,142 INFO L226 Difference]: Without dead ends: 143 [2021-06-12 19:53:43,142 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 316.7ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:53:43,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-12 19:53:43,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 117. [2021-06-12 19:53:43,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.2327586206896552) internal successors, (259), 116 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:43,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 259 transitions. [2021-06-12 19:53:43,143 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 259 transitions. Word has length 17 [2021-06-12 19:53:43,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:43,143 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 259 transitions. [2021-06-12 19:53:43,143 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) [2021-06-12 19:53:43,143 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 259 transitions. [2021-06-12 19:53:43,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:43,144 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:43,144 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:43,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-06-12 19:53:43,353 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:43,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:43,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1871644386, now seen corresponding path program 82 times [2021-06-12 19:53:43,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:43,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4005644] [2021-06-12 19:53:43,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:43,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:43,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:43,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4005644] [2021-06-12 19:53:43,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4005644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:43,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805139547] [2021-06-12 19:53:43,448 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 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 [2021-06-12 19:53:43,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:53:43,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:43,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:43,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:43,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805139547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:43,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:43,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:43,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076747576] [2021-06-12 19:53:43,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:43,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:43,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:43,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:43,641 INFO L87 Difference]: Start difference. First operand 117 states and 259 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) [2021-06-12 19:53:43,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:43,855 INFO L93 Difference]: Finished difference Result 153 states and 321 transitions. [2021-06-12 19:53:43,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:53:43,855 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 [2021-06-12 19:53:43,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:43,856 INFO L225 Difference]: With dead ends: 153 [2021-06-12 19:53:43,856 INFO L226 Difference]: Without dead ends: 153 [2021-06-12 19:53:43,856 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 301.0ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:53:43,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-12 19:53:43,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 118. [2021-06-12 19:53:43,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.230769230769231) internal successors, (261), 117 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:43,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 261 transitions. [2021-06-12 19:53:43,857 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 261 transitions. Word has length 17 [2021-06-12 19:53:43,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:43,857 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 261 transitions. [2021-06-12 19:53:43,858 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) [2021-06-12 19:53:43,858 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 261 transitions. [2021-06-12 19:53:43,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:43,858 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:43,858 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:44,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-06-12 19:53:44,058 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:44,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:44,059 INFO L82 PathProgramCache]: Analyzing trace with hash -2135772675, now seen corresponding path program 83 times [2021-06-12 19:53:44,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:44,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741262159] [2021-06-12 19:53:44,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:44,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:44,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741262159] [2021-06-12 19:53:44,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741262159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:44,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986896668] [2021-06-12 19:53:44,161 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 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 [2021-06-12 19:53:44,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:53:44,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:44,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:44,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:44,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986896668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:44,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:44,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:44,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336369122] [2021-06-12 19:53:44,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:44,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:44,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:44,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:44,315 INFO L87 Difference]: Start difference. First operand 118 states and 261 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) [2021-06-12 19:53:44,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:44,625 INFO L93 Difference]: Finished difference Result 196 states and 397 transitions. [2021-06-12 19:53:44,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:53:44,625 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 [2021-06-12 19:53:44,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:44,625 INFO L225 Difference]: With dead ends: 196 [2021-06-12 19:53:44,625 INFO L226 Difference]: Without dead ends: 196 [2021-06-12 19:53:44,626 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 344.8ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:53:44,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-12 19:53:44,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 119. [2021-06-12 19:53:44,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.2542372881355934) internal successors, (266), 118 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:44,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 266 transitions. [2021-06-12 19:53:44,628 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 266 transitions. Word has length 17 [2021-06-12 19:53:44,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:44,628 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 266 transitions. [2021-06-12 19:53:44,628 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) [2021-06-12 19:53:44,628 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 266 transitions. [2021-06-12 19:53:44,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:44,628 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:44,629 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:44,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-06-12 19:53:44,851 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:44,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:44,851 INFO L82 PathProgramCache]: Analyzing trace with hash 199159296, now seen corresponding path program 84 times [2021-06-12 19:53:44,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:44,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987928358] [2021-06-12 19:53:44,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:44,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:44,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987928358] [2021-06-12 19:53:44,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987928358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:44,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627956527] [2021-06-12 19:53:44,958 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 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 [2021-06-12 19:53:44,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:53:44,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:44,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:44,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:45,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:45,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627956527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:45,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:45,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:45,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725917125] [2021-06-12 19:53:45,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:45,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:45,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:45,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:45,158 INFO L87 Difference]: Start difference. First operand 119 states and 266 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) [2021-06-12 19:53:45,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:45,336 INFO L93 Difference]: Finished difference Result 140 states and 301 transitions. [2021-06-12 19:53:45,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:53:45,336 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 [2021-06-12 19:53:45,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:45,337 INFO L225 Difference]: With dead ends: 140 [2021-06-12 19:53:45,337 INFO L226 Difference]: Without dead ends: 134 [2021-06-12 19:53:45,337 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 302.1ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:53:45,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-12 19:53:45,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 119. [2021-06-12 19:53:45,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.2457627118644066) internal successors, (265), 118 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:45,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 265 transitions. [2021-06-12 19:53:45,341 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 265 transitions. Word has length 17 [2021-06-12 19:53:45,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:45,341 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 265 transitions. [2021-06-12 19:53:45,342 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) [2021-06-12 19:53:45,342 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 265 transitions. [2021-06-12 19:53:45,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:45,342 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:45,342 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:45,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-06-12 19:53:45,563 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:45,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:45,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1833782395, now seen corresponding path program 85 times [2021-06-12 19:53:45,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:45,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572298109] [2021-06-12 19:53:45,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:45,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:45,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572298109] [2021-06-12 19:53:45,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572298109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:45,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403616761] [2021-06-12 19:53:45,664 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 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 [2021-06-12 19:53:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:45,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:45,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:45,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403616761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:45,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:45,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:45,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001646707] [2021-06-12 19:53:45,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:45,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:45,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:45,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:45,818 INFO L87 Difference]: Start difference. First operand 119 states and 265 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) [2021-06-12 19:53:45,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:45,993 INFO L93 Difference]: Finished difference Result 150 states and 322 transitions. [2021-06-12 19:53:45,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:53:45,994 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 [2021-06-12 19:53:45,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:45,994 INFO L225 Difference]: With dead ends: 150 [2021-06-12 19:53:45,994 INFO L226 Difference]: Without dead ends: 150 [2021-06-12 19:53:45,995 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 236.7ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:53:45,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-12 19:53:45,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 116. [2021-06-12 19:53:45,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.226086956521739) internal successors, (256), 115 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:45,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 256 transitions. [2021-06-12 19:53:45,997 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 256 transitions. Word has length 17 [2021-06-12 19:53:45,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:45,997 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 256 transitions. [2021-06-12 19:53:45,997 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) [2021-06-12 19:53:45,997 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 256 transitions. [2021-06-12 19:53:45,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:45,997 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:45,997 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:46,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-06-12 19:53:46,201 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:46,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:46,201 INFO L82 PathProgramCache]: Analyzing trace with hash -111496436, now seen corresponding path program 86 times [2021-06-12 19:53:46,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:46,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778273910] [2021-06-12 19:53:46,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:46,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:46,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778273910] [2021-06-12 19:53:46,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778273910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:46,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478321681] [2021-06-12 19:53:46,271 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 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 [2021-06-12 19:53:46,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:46,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:46,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:53:46,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:46,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:46,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478321681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:46,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:46,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:53:46,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835951670] [2021-06-12 19:53:46,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:53:46,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:46,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:53:46,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:53:46,495 INFO L87 Difference]: Start difference. First operand 116 states and 256 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) [2021-06-12 19:53:46,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:46,797 INFO L93 Difference]: Finished difference Result 136 states and 296 transitions. [2021-06-12 19:53:46,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:53:46,797 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 17 [2021-06-12 19:53:46,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:46,797 INFO L225 Difference]: With dead ends: 136 [2021-06-12 19:53:46,797 INFO L226 Difference]: Without dead ends: 136 [2021-06-12 19:53:46,798 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 402.0ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:53:46,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-12 19:53:46,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 116. [2021-06-12 19:53:46,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.226086956521739) internal successors, (256), 115 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:46,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 256 transitions. [2021-06-12 19:53:46,799 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 256 transitions. Word has length 17 [2021-06-12 19:53:46,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:46,800 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 256 transitions. [2021-06-12 19:53:46,800 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) [2021-06-12 19:53:46,800 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 256 transitions. [2021-06-12 19:53:46,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:46,800 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:46,800 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:47,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-06-12 19:53:47,013 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:47,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:47,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1182491900, now seen corresponding path program 87 times [2021-06-12 19:53:47,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:47,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221893037] [2021-06-12 19:53:47,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:47,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:47,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221893037] [2021-06-12 19:53:47,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221893037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:47,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113264779] [2021-06-12 19:53:47,101 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 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 [2021-06-12 19:53:47,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:53:47,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:47,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:53:47,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:47,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113264779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:47,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:47,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:47,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853428624] [2021-06-12 19:53:47,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:47,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:47,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:47,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:47,346 INFO L87 Difference]: Start difference. First operand 116 states and 256 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) [2021-06-12 19:53:47,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:47,669 INFO L93 Difference]: Finished difference Result 142 states and 308 transitions. [2021-06-12 19:53:47,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:53:47,669 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 [2021-06-12 19:53:47,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:47,669 INFO L225 Difference]: With dead ends: 142 [2021-06-12 19:53:47,670 INFO L226 Difference]: Without dead ends: 142 [2021-06-12 19:53:47,670 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 446.3ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:53:47,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-12 19:53:47,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 117. [2021-06-12 19:53:47,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.2327586206896552) internal successors, (259), 116 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:47,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 259 transitions. [2021-06-12 19:53:47,671 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 259 transitions. Word has length 17 [2021-06-12 19:53:47,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:47,671 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 259 transitions. [2021-06-12 19:53:47,671 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) [2021-06-12 19:53:47,671 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 259 transitions. [2021-06-12 19:53:47,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:47,672 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:47,672 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:47,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-06-12 19:53:47,877 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:47,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:47,877 INFO L82 PathProgramCache]: Analyzing trace with hash 984390345, now seen corresponding path program 88 times [2021-06-12 19:53:47,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:47,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187748019] [2021-06-12 19:53:47,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:47,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:47,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187748019] [2021-06-12 19:53:47,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187748019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:47,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310258601] [2021-06-12 19:53:47,955 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 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 [2021-06-12 19:53:47,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:53:47,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:47,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:47,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:48,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310258601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:48,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:48,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:48,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896878336] [2021-06-12 19:53:48,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:48,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:48,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:48,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:48,216 INFO L87 Difference]: Start difference. First operand 117 states and 259 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) [2021-06-12 19:53:48,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:48,464 INFO L93 Difference]: Finished difference Result 160 states and 328 transitions. [2021-06-12 19:53:48,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:53:48,464 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 [2021-06-12 19:53:48,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:48,465 INFO L225 Difference]: With dead ends: 160 [2021-06-12 19:53:48,465 INFO L226 Difference]: Without dead ends: 156 [2021-06-12 19:53:48,465 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 371.6ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:48,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-12 19:53:48,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 123. [2021-06-12 19:53:48,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.2295081967213113) internal successors, (272), 122 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:48,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 272 transitions. [2021-06-12 19:53:48,467 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 272 transitions. Word has length 17 [2021-06-12 19:53:48,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:48,467 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 272 transitions. [2021-06-12 19:53:48,468 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) [2021-06-12 19:53:48,468 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 272 transitions. [2021-06-12 19:53:48,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:48,468 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:48,468 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:48,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:48,669 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:48,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:48,669 INFO L82 PathProgramCache]: Analyzing trace with hash 741639945, now seen corresponding path program 89 times [2021-06-12 19:53:48,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:48,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208320838] [2021-06-12 19:53:48,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:48,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:48,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:48,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:48,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208320838] [2021-06-12 19:53:48,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208320838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:48,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022431065] [2021-06-12 19:53:48,744 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 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 [2021-06-12 19:53:48,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:53:48,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:48,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:48,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:48,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:48,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022431065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:48,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:48,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:48,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603312906] [2021-06-12 19:53:48,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:48,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:48,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:48,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:48,997 INFO L87 Difference]: Start difference. First operand 123 states and 272 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) [2021-06-12 19:53:49,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:49,100 INFO L93 Difference]: Finished difference Result 134 states and 291 transitions. [2021-06-12 19:53:49,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:53:49,101 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 [2021-06-12 19:53:49,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:49,101 INFO L225 Difference]: With dead ends: 134 [2021-06-12 19:53:49,101 INFO L226 Difference]: Without dead ends: 134 [2021-06-12 19:53:49,102 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 267.5ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:53:49,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-12 19:53:49,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 115. [2021-06-12 19:53:49,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.2280701754385963) internal successors, (254), 114 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:49,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 254 transitions. [2021-06-12 19:53:49,103 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 254 transitions. Word has length 17 [2021-06-12 19:53:49,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:49,104 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 254 transitions. [2021-06-12 19:53:49,104 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) [2021-06-12 19:53:49,104 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 254 transitions. [2021-06-12 19:53:49,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:49,104 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:49,104 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:49,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:49,329 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:49,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:49,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1629340458, now seen corresponding path program 90 times [2021-06-12 19:53:49,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:49,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866435054] [2021-06-12 19:53:49,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:49,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:49,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:49,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:49,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866435054] [2021-06-12 19:53:49,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866435054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:49,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534629779] [2021-06-12 19:53:49,443 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 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 [2021-06-12 19:53:49,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:53:49,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:49,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:49,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:49,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534629779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:49,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:49,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:49,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564282957] [2021-06-12 19:53:49,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:49,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:49,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:49,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:49,632 INFO L87 Difference]: Start difference. First operand 115 states and 254 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) [2021-06-12 19:53:49,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:49,768 INFO L93 Difference]: Finished difference Result 134 states and 292 transitions. [2021-06-12 19:53:49,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:53:49,768 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 [2021-06-12 19:53:49,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:49,769 INFO L225 Difference]: With dead ends: 134 [2021-06-12 19:53:49,769 INFO L226 Difference]: Without dead ends: 134 [2021-06-12 19:53:49,769 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 248.4ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:53:49,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-12 19:53:49,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 115. [2021-06-12 19:53:49,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.2280701754385963) internal successors, (254), 114 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:49,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 254 transitions. [2021-06-12 19:53:49,771 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 254 transitions. Word has length 17 [2021-06-12 19:53:49,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:49,771 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 254 transitions. [2021-06-12 19:53:49,771 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) [2021-06-12 19:53:49,771 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 254 transitions. [2021-06-12 19:53:49,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:49,771 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:49,771 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:49,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:49,979 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:49,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:49,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1868891086, now seen corresponding path program 91 times [2021-06-12 19:53:49,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:49,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662633681] [2021-06-12 19:53:49,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:49,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:50,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:50,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:50,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662633681] [2021-06-12 19:53:50,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662633681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:50,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939451867] [2021-06-12 19:53:50,088 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 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 [2021-06-12 19:53:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:50,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:50,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:50,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939451867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:50,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:50,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:50,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727775410] [2021-06-12 19:53:50,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:50,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:50,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:50,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:50,267 INFO L87 Difference]: Start difference. First operand 115 states and 254 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) [2021-06-12 19:53:50,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:50,541 INFO L93 Difference]: Finished difference Result 148 states and 315 transitions. [2021-06-12 19:53:50,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:53:50,541 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 [2021-06-12 19:53:50,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:50,542 INFO L225 Difference]: With dead ends: 148 [2021-06-12 19:53:50,542 INFO L226 Difference]: Without dead ends: 145 [2021-06-12 19:53:50,542 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 350.0ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:53:50,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-12 19:53:50,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 115. [2021-06-12 19:53:50,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.219298245614035) internal successors, (253), 114 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:50,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 253 transitions. [2021-06-12 19:53:50,543 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 253 transitions. Word has length 17 [2021-06-12 19:53:50,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:50,543 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 253 transitions. [2021-06-12 19:53:50,543 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) [2021-06-12 19:53:50,543 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 253 transitions. [2021-06-12 19:53:50,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:50,544 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:50,544 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:50,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-12 19:53:50,744 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:50,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:50,745 INFO L82 PathProgramCache]: Analyzing trace with hash -741494993, now seen corresponding path program 92 times [2021-06-12 19:53:50,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:50,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266438547] [2021-06-12 19:53:50,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:50,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:50,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266438547] [2021-06-12 19:53:50,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266438547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:50,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925855055] [2021-06-12 19:53:50,833 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 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 [2021-06-12 19:53:50,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:50,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:50,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:50,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:51,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:51,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925855055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:51,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:51,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:51,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40804236] [2021-06-12 19:53:51,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:51,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:51,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:51,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:51,051 INFO L87 Difference]: Start difference. First operand 115 states and 253 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) [2021-06-12 19:53:51,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:51,203 INFO L93 Difference]: Finished difference Result 133 states and 285 transitions. [2021-06-12 19:53:51,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:53:51,203 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 [2021-06-12 19:53:51,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:51,203 INFO L225 Difference]: With dead ends: 133 [2021-06-12 19:53:51,203 INFO L226 Difference]: Without dead ends: 131 [2021-06-12 19:53:51,204 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 307.5ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:51,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-12 19:53:51,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 113. [2021-06-12 19:53:51,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.2142857142857144) internal successors, (248), 112 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:51,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 248 transitions. [2021-06-12 19:53:51,205 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 248 transitions. Word has length 17 [2021-06-12 19:53:51,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:51,205 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 248 transitions. [2021-06-12 19:53:51,205 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) [2021-06-12 19:53:51,205 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 248 transitions. [2021-06-12 19:53:51,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:51,205 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:51,205 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:51,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:51,406 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:51,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:51,406 INFO L82 PathProgramCache]: Analyzing trace with hash -235148727, now seen corresponding path program 93 times [2021-06-12 19:53:51,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:51,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137044489] [2021-06-12 19:53:51,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:51,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:51,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:51,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:51,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137044489] [2021-06-12 19:53:51,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137044489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:51,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380454602] [2021-06-12 19:53:51,505 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 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 [2021-06-12 19:53:51,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:53:51,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:51,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:51,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:51,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380454602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:51,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:51,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:51,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508858785] [2021-06-12 19:53:51,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:51,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:51,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:51,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:51,654 INFO L87 Difference]: Start difference. First operand 113 states and 248 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) [2021-06-12 19:53:51,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:51,863 INFO L93 Difference]: Finished difference Result 184 states and 371 transitions. [2021-06-12 19:53:51,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:53:51,863 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 [2021-06-12 19:53:51,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:51,864 INFO L225 Difference]: With dead ends: 184 [2021-06-12 19:53:51,864 INFO L226 Difference]: Without dead ends: 184 [2021-06-12 19:53:51,864 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 257.2ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:53:51,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-12 19:53:51,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 115. [2021-06-12 19:53:51,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.236842105263158) internal successors, (255), 114 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:51,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 255 transitions. [2021-06-12 19:53:51,866 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 255 transitions. Word has length 17 [2021-06-12 19:53:51,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:51,866 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 255 transitions. [2021-06-12 19:53:51,866 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) [2021-06-12 19:53:51,867 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 255 transitions. [2021-06-12 19:53:51,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:51,867 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:51,867 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:52,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-06-12 19:53:52,073 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:52,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:52,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1259937386, now seen corresponding path program 94 times [2021-06-12 19:53:52,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:52,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631954267] [2021-06-12 19:53:52,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:52,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:52,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631954267] [2021-06-12 19:53:52,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631954267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:52,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967183717] [2021-06-12 19:53:52,162 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 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 [2021-06-12 19:53:52,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:53:52,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:52,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:52,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:52,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:52,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967183717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:52,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:52,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:52,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883418438] [2021-06-12 19:53:52,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:52,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:52,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:52,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:52,357 INFO L87 Difference]: Start difference. First operand 115 states and 255 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) [2021-06-12 19:53:52,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:52,519 INFO L93 Difference]: Finished difference Result 144 states and 298 transitions. [2021-06-12 19:53:52,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:53:52,520 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 [2021-06-12 19:53:52,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:52,521 INFO L225 Difference]: With dead ends: 144 [2021-06-12 19:53:52,521 INFO L226 Difference]: Without dead ends: 138 [2021-06-12 19:53:52,521 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 265.3ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:52,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-12 19:53:52,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 121. [2021-06-12 19:53:52,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.2) internal successors, (264), 120 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) [2021-06-12 19:53:52,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 264 transitions. [2021-06-12 19:53:52,523 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 264 transitions. Word has length 17 [2021-06-12 19:53:52,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:52,523 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 264 transitions. [2021-06-12 19:53:52,523 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) [2021-06-12 19:53:52,523 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 264 transitions. [2021-06-12 19:53:52,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:52,523 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:52,523 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:52,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:52,733 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:52,733 INFO L82 PathProgramCache]: Analyzing trace with hash -773004305, now seen corresponding path program 95 times [2021-06-12 19:53:52,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:52,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076800731] [2021-06-12 19:53:52,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:52,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:52,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076800731] [2021-06-12 19:53:52,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076800731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:52,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003235306] [2021-06-12 19:53:52,850 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 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 [2021-06-12 19:53:52,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:53:52,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:52,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:52,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:53,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003235306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:53,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:53,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:53,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946114740] [2021-06-12 19:53:53,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:53,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:53,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:53,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:53,027 INFO L87 Difference]: Start difference. First operand 121 states and 264 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) [2021-06-12 19:53:53,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:53,179 INFO L93 Difference]: Finished difference Result 142 states and 303 transitions. [2021-06-12 19:53:53,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:53:53,180 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 [2021-06-12 19:53:53,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:53,180 INFO L225 Difference]: With dead ends: 142 [2021-06-12 19:53:53,180 INFO L226 Difference]: Without dead ends: 142 [2021-06-12 19:53:53,180 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 257.3ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:53:53,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-12 19:53:53,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 119. [2021-06-12 19:53:53,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1779661016949152) internal successors, (257), 118 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:53,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 257 transitions. [2021-06-12 19:53:53,182 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 257 transitions. Word has length 17 [2021-06-12 19:53:53,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:53,183 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 257 transitions. [2021-06-12 19:53:53,183 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) [2021-06-12 19:53:53,183 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 257 transitions. [2021-06-12 19:53:53,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:53,183 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:53,183 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:53,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-06-12 19:53:53,393 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:53,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:53,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1398169660, now seen corresponding path program 96 times [2021-06-12 19:53:53,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:53,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264417840] [2021-06-12 19:53:53,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:53,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:53,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:53,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264417840] [2021-06-12 19:53:53,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264417840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:53,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320757251] [2021-06-12 19:53:53,500 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 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 [2021-06-12 19:53:53,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:53:53,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:53,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:53,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:53,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320757251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:53,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:53,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:53,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093505479] [2021-06-12 19:53:53,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:53,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:53,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:53,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:53,641 INFO L87 Difference]: Start difference. First operand 119 states and 257 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) [2021-06-12 19:53:53,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:53,728 INFO L93 Difference]: Finished difference Result 138 states and 295 transitions. [2021-06-12 19:53:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:53:53,728 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 [2021-06-12 19:53:53,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:53,729 INFO L225 Difference]: With dead ends: 138 [2021-06-12 19:53:53,729 INFO L226 Difference]: Without dead ends: 138 [2021-06-12 19:53:53,729 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 168.4ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:53,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-12 19:53:53,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 119. [2021-06-12 19:53:53,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1779661016949152) internal successors, (257), 118 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:53,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 257 transitions. [2021-06-12 19:53:53,730 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 257 transitions. Word has length 17 [2021-06-12 19:53:53,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:53,730 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 257 transitions. [2021-06-12 19:53:53,730 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) [2021-06-12 19:53:53,730 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 257 transitions. [2021-06-12 19:53:53,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:53,731 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:53,731 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:53,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable600 [2021-06-12 19:53:53,933 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:53,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:53,933 INFO L82 PathProgramCache]: Analyzing trace with hash -601433908, now seen corresponding path program 97 times [2021-06-12 19:53:53,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:53,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334874377] [2021-06-12 19:53:53,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:54,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:54,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334874377] [2021-06-12 19:53:54,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334874377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:54,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199058021] [2021-06-12 19:53:54,047 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 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 [2021-06-12 19:53:54,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:54,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:54,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:54,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199058021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:54,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:54,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:54,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506790402] [2021-06-12 19:53:54,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:54,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:54,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:54,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:54,197 INFO L87 Difference]: Start difference. First operand 119 states and 257 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) [2021-06-12 19:53:54,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:54,303 INFO L93 Difference]: Finished difference Result 148 states and 315 transitions. [2021-06-12 19:53:54,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:53:54,304 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 [2021-06-12 19:53:54,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:54,304 INFO L225 Difference]: With dead ends: 148 [2021-06-12 19:53:54,304 INFO L226 Difference]: Without dead ends: 148 [2021-06-12 19:53:54,304 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 164.3ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:54,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-12 19:53:54,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 119. [2021-06-12 19:53:54,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1779661016949152) internal successors, (257), 118 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:54,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 257 transitions. [2021-06-12 19:53:54,306 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 257 transitions. Word has length 17 [2021-06-12 19:53:54,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:54,306 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 257 transitions. [2021-06-12 19:53:54,306 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) [2021-06-12 19:53:54,306 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 257 transitions. [2021-06-12 19:53:54,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:54,307 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:54,307 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:54,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:54,513 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:54,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:54,513 INFO L82 PathProgramCache]: Analyzing trace with hash -313883673, now seen corresponding path program 98 times [2021-06-12 19:53:54,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:54,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325787358] [2021-06-12 19:53:54,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:54,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:54,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325787358] [2021-06-12 19:53:54,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325787358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:54,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753357770] [2021-06-12 19:53:54,624 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 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 [2021-06-12 19:53:54,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:54,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:54,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:53:54,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:54,894 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-12 19:53:54,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:54,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753357770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:54,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:54,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:54,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316677833] [2021-06-12 19:53:54,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:54,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:54,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:54,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:54,939 INFO L87 Difference]: Start difference. First operand 119 states and 257 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) [2021-06-12 19:53:55,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:55,106 INFO L93 Difference]: Finished difference Result 134 states and 282 transitions. [2021-06-12 19:53:55,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:53:55,106 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 [2021-06-12 19:53:55,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:55,107 INFO L225 Difference]: With dead ends: 134 [2021-06-12 19:53:55,107 INFO L226 Difference]: Without dead ends: 134 [2021-06-12 19:53:55,107 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 404.8ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:53:55,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-12 19:53:55,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 112. [2021-06-12 19:53:55,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.126126126126126) internal successors, (236), 111 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:55,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 236 transitions. [2021-06-12 19:53:55,108 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 236 transitions. Word has length 17 [2021-06-12 19:53:55,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:55,109 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 236 transitions. [2021-06-12 19:53:55,109 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) [2021-06-12 19:53:55,109 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 236 transitions. [2021-06-12 19:53:55,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:55,109 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:55,109 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:55,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:55,317 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:55,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:55,317 INFO L82 PathProgramCache]: Analyzing trace with hash -302282879, now seen corresponding path program 99 times [2021-06-12 19:53:55,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:55,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344495756] [2021-06-12 19:53:55,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:55,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:55,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:55,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344495756] [2021-06-12 19:53:55,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344495756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:55,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125523441] [2021-06-12 19:53:55,424 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 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 [2021-06-12 19:53:55,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:53:55,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:55,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:55,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:55,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125523441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:55,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:55,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:55,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260157701] [2021-06-12 19:53:55,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:55,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:55,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:55,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:55,593 INFO L87 Difference]: Start difference. First operand 112 states and 236 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) [2021-06-12 19:53:55,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:55,907 INFO L93 Difference]: Finished difference Result 150 states and 305 transitions. [2021-06-12 19:53:55,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:53:55,908 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 [2021-06-12 19:53:55,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:55,908 INFO L225 Difference]: With dead ends: 150 [2021-06-12 19:53:55,908 INFO L226 Difference]: Without dead ends: 148 [2021-06-12 19:53:55,908 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 386.1ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:53:55,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-12 19:53:55,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 118. [2021-06-12 19:53:55,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1367521367521367) internal successors, (250), 117 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:55,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 250 transitions. [2021-06-12 19:53:55,910 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 250 transitions. Word has length 17 [2021-06-12 19:53:55,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:55,910 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 250 transitions. [2021-06-12 19:53:55,910 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) [2021-06-12 19:53:55,910 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 250 transitions. [2021-06-12 19:53:55,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:55,911 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:55,911 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:56,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-06-12 19:53:56,111 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:56,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:56,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1032308451, now seen corresponding path program 100 times [2021-06-12 19:53:56,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:56,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333738619] [2021-06-12 19:53:56,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:56,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:56,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333738619] [2021-06-12 19:53:56,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333738619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:56,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511957594] [2021-06-12 19:53:56,214 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 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 [2021-06-12 19:53:56,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:53:56,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:56,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:56,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:56,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:56,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511957594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:56,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:56,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:56,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966612968] [2021-06-12 19:53:56,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:56,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:56,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:56,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:56,405 INFO L87 Difference]: Start difference. First operand 118 states and 250 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) [2021-06-12 19:53:56,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:56,699 INFO L93 Difference]: Finished difference Result 156 states and 319 transitions. [2021-06-12 19:53:56,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:53:56,699 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 [2021-06-12 19:53:56,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:56,700 INFO L225 Difference]: With dead ends: 156 [2021-06-12 19:53:56,700 INFO L226 Difference]: Without dead ends: 156 [2021-06-12 19:53:56,700 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 390.4ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:53:56,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-12 19:53:56,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 117. [2021-06-12 19:53:56,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1379310344827585) internal successors, (248), 116 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 248 transitions. [2021-06-12 19:53:56,701 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 248 transitions. Word has length 17 [2021-06-12 19:53:56,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:56,701 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 248 transitions. [2021-06-12 19:53:56,701 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) [2021-06-12 19:53:56,701 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 248 transitions. [2021-06-12 19:53:56,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:56,701 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:56,701 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:56,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:56,902 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:56,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:56,902 INFO L82 PathProgramCache]: Analyzing trace with hash 494452873, now seen corresponding path program 101 times [2021-06-12 19:53:56,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:56,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673632623] [2021-06-12 19:53:56,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:56,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:57,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:57,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673632623] [2021-06-12 19:53:57,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673632623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:57,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941418839] [2021-06-12 19:53:57,023 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 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 [2021-06-12 19:53:57,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:53:57,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:57,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:57,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:57,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:57,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941418839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:57,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:57,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:57,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381266324] [2021-06-12 19:53:57,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:57,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:57,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:57,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:57,212 INFO L87 Difference]: Start difference. First operand 117 states and 248 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) [2021-06-12 19:53:57,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:57,395 INFO L93 Difference]: Finished difference Result 136 states and 284 transitions. [2021-06-12 19:53:57,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:53:57,396 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 [2021-06-12 19:53:57,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:57,396 INFO L225 Difference]: With dead ends: 136 [2021-06-12 19:53:57,396 INFO L226 Difference]: Without dead ends: 136 [2021-06-12 19:53:57,397 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 275.9ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:53:57,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-12 19:53:57,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 111. [2021-06-12 19:53:57,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1272727272727274) internal successors, (234), 110 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:57,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 234 transitions. [2021-06-12 19:53:57,398 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 234 transitions. Word has length 17 [2021-06-12 19:53:57,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:57,398 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 234 transitions. [2021-06-12 19:53:57,398 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) [2021-06-12 19:53:57,398 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 234 transitions. [2021-06-12 19:53:57,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:57,398 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:57,398 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:57,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-06-12 19:53:57,599 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:57,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:57,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1578222580, now seen corresponding path program 102 times [2021-06-12 19:53:57,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:57,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097025235] [2021-06-12 19:53:57,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:57,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:57,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097025235] [2021-06-12 19:53:57,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097025235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:57,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187137864] [2021-06-12 19:53:57,697 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 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 [2021-06-12 19:53:57,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:53:57,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:57,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:57,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:57,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:57,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187137864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:57,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:57,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:57,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572191250] [2021-06-12 19:53:57,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:57,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:57,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:57,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:57,946 INFO L87 Difference]: Start difference. First operand 111 states and 234 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) [2021-06-12 19:53:58,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:58,054 INFO L93 Difference]: Finished difference Result 127 states and 266 transitions. [2021-06-12 19:53:58,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:53:58,054 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 [2021-06-12 19:53:58,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:58,054 INFO L225 Difference]: With dead ends: 127 [2021-06-12 19:53:58,054 INFO L226 Difference]: Without dead ends: 127 [2021-06-12 19:53:58,055 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 287.5ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:53:58,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-12 19:53:58,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 114. [2021-06-12 19:53:58,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.1238938053097347) internal successors, (240), 113 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:58,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 240 transitions. [2021-06-12 19:53:58,056 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 240 transitions. Word has length 17 [2021-06-12 19:53:58,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:58,056 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 240 transitions. [2021-06-12 19:53:58,056 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) [2021-06-12 19:53:58,056 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 240 transitions. [2021-06-12 19:53:58,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:58,056 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:58,056 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:58,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:58,257 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:58,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:58,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1290672345, now seen corresponding path program 103 times [2021-06-12 19:53:58,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:58,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963972737] [2021-06-12 19:53:58,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:58,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:58,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963972737] [2021-06-12 19:53:58,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963972737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:58,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083798765] [2021-06-12 19:53:58,336 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 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 [2021-06-12 19:53:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:58,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:58,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:58,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:58,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083798765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:58,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:58,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:58,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209170461] [2021-06-12 19:53:58,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:58,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:58,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:58,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:58,483 INFO L87 Difference]: Start difference. First operand 114 states and 240 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) [2021-06-12 19:53:58,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:58,798 INFO L93 Difference]: Finished difference Result 157 states and 322 transitions. [2021-06-12 19:53:58,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:53:58,798 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 [2021-06-12 19:53:58,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:58,799 INFO L225 Difference]: With dead ends: 157 [2021-06-12 19:53:58,799 INFO L226 Difference]: Without dead ends: 157 [2021-06-12 19:53:58,799 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 356.0ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:53:58,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-12 19:53:58,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 118. [2021-06-12 19:53:58,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1452991452991452) internal successors, (251), 117 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:58,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 251 transitions. [2021-06-12 19:53:58,801 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 251 transitions. Word has length 17 [2021-06-12 19:53:58,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:58,801 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 251 transitions. [2021-06-12 19:53:58,801 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) [2021-06-12 19:53:58,801 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 251 transitions. [2021-06-12 19:53:58,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:58,801 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:58,801 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:59,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable633 [2021-06-12 19:53:59,017 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:59,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:59,017 INFO L82 PathProgramCache]: Analyzing trace with hash -988682065, now seen corresponding path program 104 times [2021-06-12 19:53:59,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:59,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128233288] [2021-06-12 19:53:59,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:59,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:59,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:59,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128233288] [2021-06-12 19:53:59,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128233288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:59,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421755752] [2021-06-12 19:53:59,098 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 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 [2021-06-12 19:53:59,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:59,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:59,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:59,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:59,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421755752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:59,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:59,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:59,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420423165] [2021-06-12 19:53:59,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:59,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:59,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:59,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:59,262 INFO L87 Difference]: Start difference. First operand 118 states and 251 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) [2021-06-12 19:53:59,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:59,537 INFO L93 Difference]: Finished difference Result 145 states and 303 transitions. [2021-06-12 19:53:59,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:53:59,537 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 [2021-06-12 19:53:59,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:59,537 INFO L225 Difference]: With dead ends: 145 [2021-06-12 19:53:59,537 INFO L226 Difference]: Without dead ends: 145 [2021-06-12 19:53:59,538 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 357.0ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:53:59,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-12 19:53:59,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 117. [2021-06-12 19:53:59,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.146551724137931) internal successors, (249), 116 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:59,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 249 transitions. [2021-06-12 19:53:59,539 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 249 transitions. Word has length 17 [2021-06-12 19:53:59,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:59,539 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 249 transitions. [2021-06-12 19:53:59,539 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) [2021-06-12 19:53:59,539 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 249 transitions. [2021-06-12 19:53:59,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:59,540 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:59,540 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:59,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable638 [2021-06-12 19:53:59,740 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:59,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:59,740 INFO L82 PathProgramCache]: Analyzing trace with hash -482335799, now seen corresponding path program 105 times [2021-06-12 19:53:59,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:59,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574232162] [2021-06-12 19:53:59,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:59,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:59,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574232162] [2021-06-12 19:53:59,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574232162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:59,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584270775] [2021-06-12 19:53:59,805 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 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 [2021-06-12 19:53:59,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:53:59,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:59,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:59,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:59,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584270775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:59,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:59,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:53:59,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639867126] [2021-06-12 19:53:59,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:53:59,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:59,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:53:59,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:53:59,951 INFO L87 Difference]: Start difference. First operand 117 states and 249 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) [2021-06-12 19:54:00,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:00,179 INFO L93 Difference]: Finished difference Result 137 states and 286 transitions. [2021-06-12 19:54:00,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:54:00,179 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 17 [2021-06-12 19:54:00,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:00,179 INFO L225 Difference]: With dead ends: 137 [2021-06-12 19:54:00,180 INFO L226 Difference]: Without dead ends: 137 [2021-06-12 19:54:00,180 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 255.0ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:54:00,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-12 19:54:00,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 113. [2021-06-12 19:54:00,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1339285714285716) internal successors, (239), 112 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:00,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 239 transitions. [2021-06-12 19:54:00,181 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 239 transitions. Word has length 17 [2021-06-12 19:54:00,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:00,181 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 239 transitions. [2021-06-12 19:54:00,181 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) [2021-06-12 19:54:00,182 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 239 transitions. [2021-06-12 19:54:00,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:00,182 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:00,182 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:00,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-06-12 19:54:00,385 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:00,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:00,385 INFO L82 PathProgramCache]: Analyzing trace with hash 425996420, now seen corresponding path program 106 times [2021-06-12 19:54:00,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:00,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300349399] [2021-06-12 19:54:00,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:00,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:00,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300349399] [2021-06-12 19:54:00,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300349399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:00,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448638026] [2021-06-12 19:54:00,450 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 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 [2021-06-12 19:54:00,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:54:00,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:00,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:00,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:00,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448638026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:00,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:00,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:54:00,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319722890] [2021-06-12 19:54:00,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:54:00,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:00,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:54:00,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:54:00,581 INFO L87 Difference]: Start difference. First operand 113 states and 239 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) [2021-06-12 19:54:00,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:00,700 INFO L93 Difference]: Finished difference Result 124 states and 260 transitions. [2021-06-12 19:54:00,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:54:00,701 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 17 [2021-06-12 19:54:00,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:00,701 INFO L225 Difference]: With dead ends: 124 [2021-06-12 19:54:00,701 INFO L226 Difference]: Without dead ends: 124 [2021-06-12 19:54:00,701 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 184.2ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:00,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-12 19:54:00,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 113. [2021-06-12 19:54:00,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1339285714285716) internal successors, (239), 112 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:00,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 239 transitions. [2021-06-12 19:54:00,712 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 239 transitions. Word has length 17 [2021-06-12 19:54:00,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:00,712 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 239 transitions. [2021-06-12 19:54:00,712 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) [2021-06-12 19:54:00,712 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 239 transitions. [2021-06-12 19:54:00,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:00,712 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:00,712 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:00,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable644,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:00,928 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:00,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:00,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1120130721, now seen corresponding path program 107 times [2021-06-12 19:54:00,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:00,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669126562] [2021-06-12 19:54:00,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:00,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:00,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:00,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669126562] [2021-06-12 19:54:00,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669126562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:00,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542524512] [2021-06-12 19:54:00,993 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 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 [2021-06-12 19:54:01,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:54:01,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:01,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:01,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:01,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:01,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542524512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:01,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:01,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:54:01,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328522153] [2021-06-12 19:54:01,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:54:01,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:01,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:54:01,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:54:01,246 INFO L87 Difference]: Start difference. First operand 113 states and 239 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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) [2021-06-12 19:54:01,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:01,501 INFO L93 Difference]: Finished difference Result 119 states and 246 transitions. [2021-06-12 19:54:01,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:54:01,502 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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 [2021-06-12 19:54:01,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:01,502 INFO L225 Difference]: With dead ends: 119 [2021-06-12 19:54:01,502 INFO L226 Difference]: Without dead ends: 113 [2021-06-12 19:54:01,502 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 397.1ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:54:01,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-12 19:54:01,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-06-12 19:54:01,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:01,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-06-12 19:54:01,504 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 17 [2021-06-12 19:54:01,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:01,504 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-06-12 19:54:01,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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) [2021-06-12 19:54:01,504 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-06-12 19:54:01,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:01,504 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:01,504 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:01,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable647,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:01,705 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:01,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:01,705 INFO L82 PathProgramCache]: Analyzing trace with hash -644999044, now seen corresponding path program 108 times [2021-06-12 19:54:01,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:01,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101403960] [2021-06-12 19:54:01,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:01,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:01,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:01,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101403960] [2021-06-12 19:54:01,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101403960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:01,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199709208] [2021-06-12 19:54:01,793 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 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 [2021-06-12 19:54:01,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:54:01,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:01,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:01,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:01,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:01,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199709208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:01,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:01,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:01,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821712698] [2021-06-12 19:54:01,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:01,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:01,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:01,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:01,939 INFO L87 Difference]: Start difference. First operand 113 states and 238 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) [2021-06-12 19:54:02,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:02,211 INFO L93 Difference]: Finished difference Result 133 states and 277 transitions. [2021-06-12 19:54:02,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:54:02,212 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 [2021-06-12 19:54:02,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:02,212 INFO L225 Difference]: With dead ends: 133 [2021-06-12 19:54:02,212 INFO L226 Difference]: Without dead ends: 133 [2021-06-12 19:54:02,212 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 344.8ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:54:02,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-12 19:54:02,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 113. [2021-06-12 19:54:02,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:02,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-06-12 19:54:02,213 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 17 [2021-06-12 19:54:02,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:02,214 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-06-12 19:54:02,214 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) [2021-06-12 19:54:02,214 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-06-12 19:54:02,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:02,214 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:02,214 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:02,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-06-12 19:54:02,414 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:02,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:02,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1521883201, now seen corresponding path program 109 times [2021-06-12 19:54:02,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:02,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256211598] [2021-06-12 19:54:02,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:02,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:02,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256211598] [2021-06-12 19:54:02,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256211598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:02,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457208518] [2021-06-12 19:54:02,501 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 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 [2021-06-12 19:54:02,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:02,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:02,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:02,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:02,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457208518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:02,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:02,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:02,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353909637] [2021-06-12 19:54:02,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:02,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:02,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:02,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:02,738 INFO L87 Difference]: Start difference. First operand 113 states and 238 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) [2021-06-12 19:54:02,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:02,930 INFO L93 Difference]: Finished difference Result 151 states and 297 transitions. [2021-06-12 19:54:02,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:54:02,931 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 [2021-06-12 19:54:02,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:02,931 INFO L225 Difference]: With dead ends: 151 [2021-06-12 19:54:02,931 INFO L226 Difference]: Without dead ends: 147 [2021-06-12 19:54:02,931 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 340.4ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:02,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-12 19:54:02,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 119. [2021-06-12 19:54:02,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1271186440677967) internal successors, (251), 118 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:02,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 251 transitions. [2021-06-12 19:54:02,932 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 251 transitions. Word has length 17 [2021-06-12 19:54:02,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:02,932 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 251 transitions. [2021-06-12 19:54:02,932 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) [2021-06-12 19:54:02,932 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 251 transitions. [2021-06-12 19:54:02,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:02,933 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:02,933 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:03,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2021-06-12 19:54:03,133 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:03,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:03,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1279132801, now seen corresponding path program 110 times [2021-06-12 19:54:03,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:03,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640442718] [2021-06-12 19:54:03,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:03,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:03,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:03,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640442718] [2021-06-12 19:54:03,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640442718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:03,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336046222] [2021-06-12 19:54:03,205 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 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 [2021-06-12 19:54:03,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:03,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:03,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:54:03,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:03,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:03,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336046222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:03,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:03,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:03,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031204048] [2021-06-12 19:54:03,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:03,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:03,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:03,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:03,439 INFO L87 Difference]: Start difference. First operand 119 states and 251 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) [2021-06-12 19:54:03,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:03,554 INFO L93 Difference]: Finished difference Result 125 states and 260 transitions. [2021-06-12 19:54:03,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:54:03,555 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 [2021-06-12 19:54:03,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:03,555 INFO L225 Difference]: With dead ends: 125 [2021-06-12 19:54:03,555 INFO L226 Difference]: Without dead ends: 125 [2021-06-12 19:54:03,555 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 246.0ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:54:03,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-12 19:54:03,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 111. [2021-06-12 19:54:03,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.118181818181818) internal successors, (233), 110 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:03,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 233 transitions. [2021-06-12 19:54:03,556 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 233 transitions. Word has length 17 [2021-06-12 19:54:03,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:03,556 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 233 transitions. [2021-06-12 19:54:03,556 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) [2021-06-12 19:54:03,556 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 233 transitions. [2021-06-12 19:54:03,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:03,557 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:03,557 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:03,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable660,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:03,757 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:03,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:03,757 INFO L82 PathProgramCache]: Analyzing trace with hash -2128133982, now seen corresponding path program 111 times [2021-06-12 19:54:03,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:03,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884082955] [2021-06-12 19:54:03,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:03,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:03,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:03,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884082955] [2021-06-12 19:54:03,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884082955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:03,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880434441] [2021-06-12 19:54:03,857 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 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 [2021-06-12 19:54:03,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:54:03,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:03,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:03,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:04,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:04,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880434441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:04,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:04,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:04,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030626199] [2021-06-12 19:54:04,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:04,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:04,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:04,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:04,003 INFO L87 Difference]: Start difference. First operand 111 states and 233 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) [2021-06-12 19:54:04,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:04,133 INFO L93 Difference]: Finished difference Result 125 states and 261 transitions. [2021-06-12 19:54:04,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:54:04,134 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 [2021-06-12 19:54:04,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:04,134 INFO L225 Difference]: With dead ends: 125 [2021-06-12 19:54:04,134 INFO L226 Difference]: Without dead ends: 125 [2021-06-12 19:54:04,134 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 210.4ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:54:04,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-12 19:54:04,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 111. [2021-06-12 19:54:04,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.118181818181818) internal successors, (233), 110 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:04,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 233 transitions. [2021-06-12 19:54:04,135 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 233 transitions. Word has length 17 [2021-06-12 19:54:04,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:04,135 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 233 transitions. [2021-06-12 19:54:04,135 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) [2021-06-12 19:54:04,135 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 233 transitions. [2021-06-12 19:54:04,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:04,136 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:04,136 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:04,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-06-12 19:54:04,336 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:04,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:04,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1331398230, now seen corresponding path program 112 times [2021-06-12 19:54:04,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:04,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825980582] [2021-06-12 19:54:04,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:04,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:04,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825980582] [2021-06-12 19:54:04,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825980582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:04,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685350791] [2021-06-12 19:54:04,423 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 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 [2021-06-12 19:54:04,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:54:04,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:04,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:04,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:04,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685350791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:04,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:04,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:04,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997197801] [2021-06-12 19:54:04,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:04,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:04,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:04,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:04,560 INFO L87 Difference]: Start difference. First operand 111 states and 233 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) [2021-06-12 19:54:04,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:04,755 INFO L93 Difference]: Finished difference Result 134 states and 279 transitions. [2021-06-12 19:54:04,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:54:04,755 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 [2021-06-12 19:54:04,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:04,756 INFO L225 Difference]: With dead ends: 134 [2021-06-12 19:54:04,756 INFO L226 Difference]: Without dead ends: 134 [2021-06-12 19:54:04,756 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 281.5ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:54:04,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-12 19:54:04,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 111. [2021-06-12 19:54:04,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.118181818181818) internal successors, (233), 110 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:04,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 233 transitions. [2021-06-12 19:54:04,757 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 233 transitions. Word has length 17 [2021-06-12 19:54:04,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:04,757 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 233 transitions. [2021-06-12 19:54:04,757 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) [2021-06-12 19:54:04,757 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 233 transitions. [2021-06-12 19:54:04,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:04,758 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:04,758 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:04,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:04,958 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:04,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:04,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1043847995, now seen corresponding path program 113 times [2021-06-12 19:54:04,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:04,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200282417] [2021-06-12 19:54:04,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:04,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:05,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:05,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200282417] [2021-06-12 19:54:05,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200282417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:05,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177096896] [2021-06-12 19:54:05,070 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 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 [2021-06-12 19:54:05,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:54:05,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:05,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:05,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:05,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177096896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:05,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:05,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:05,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621953623] [2021-06-12 19:54:05,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:05,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:05,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:05,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:05,345 INFO L87 Difference]: Start difference. First operand 111 states and 233 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) [2021-06-12 19:54:05,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:05,511 INFO L93 Difference]: Finished difference Result 121 states and 251 transitions. [2021-06-12 19:54:05,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:54:05,511 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 [2021-06-12 19:54:05,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:05,511 INFO L225 Difference]: With dead ends: 121 [2021-06-12 19:54:05,511 INFO L226 Difference]: Without dead ends: 121 [2021-06-12 19:54:05,512 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 366.0ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:54:05,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-12 19:54:05,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 108. [2021-06-12 19:54:05,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.1121495327102804) internal successors, (226), 107 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:05,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 226 transitions. [2021-06-12 19:54:05,513 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 226 transitions. Word has length 17 [2021-06-12 19:54:05,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:05,513 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 226 transitions. [2021-06-12 19:54:05,513 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) [2021-06-12 19:54:05,513 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 226 transitions. [2021-06-12 19:54:05,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:05,513 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:05,513 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:05,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable674 [2021-06-12 19:54:05,714 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:05,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:05,714 INFO L82 PathProgramCache]: Analyzing trace with hash 302344129, now seen corresponding path program 114 times [2021-06-12 19:54:05,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:05,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445386418] [2021-06-12 19:54:05,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:05,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:05,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:05,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445386418] [2021-06-12 19:54:05,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445386418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:05,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849296817] [2021-06-12 19:54:05,804 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 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 [2021-06-12 19:54:05,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:54:05,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:05,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:05,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:05,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849296817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:05,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:05,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:05,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070245809] [2021-06-12 19:54:05,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:05,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:05,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:05,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:05,944 INFO L87 Difference]: Start difference. First operand 108 states and 226 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) [2021-06-12 19:54:06,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:06,130 INFO L93 Difference]: Finished difference Result 172 states and 335 transitions. [2021-06-12 19:54:06,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:54:06,130 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 [2021-06-12 19:54:06,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:06,131 INFO L225 Difference]: With dead ends: 172 [2021-06-12 19:54:06,131 INFO L226 Difference]: Without dead ends: 172 [2021-06-12 19:54:06,131 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 236.5ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:06,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-12 19:54:06,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 110. [2021-06-12 19:54:06,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:06,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-06-12 19:54:06,132 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 17 [2021-06-12 19:54:06,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:06,132 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-06-12 19:54:06,132 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) [2021-06-12 19:54:06,132 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-06-12 19:54:06,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:06,132 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:06,132 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:06,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:06,333 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:06,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:06,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1797430242, now seen corresponding path program 115 times [2021-06-12 19:54:06,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:06,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857302817] [2021-06-12 19:54:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:06,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:06,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857302817] [2021-06-12 19:54:06,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857302817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:06,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759992918] [2021-06-12 19:54:06,431 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 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 [2021-06-12 19:54:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:06,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:06,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:06,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:06,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759992918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:06,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:06,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:06,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590741128] [2021-06-12 19:54:06,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:06,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:06,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:06,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:06,611 INFO L87 Difference]: Start difference. First operand 110 states and 233 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) [2021-06-12 19:54:06,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:06,742 INFO L93 Difference]: Finished difference Result 150 states and 297 transitions. [2021-06-12 19:54:06,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:54:06,742 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 [2021-06-12 19:54:06,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:06,742 INFO L225 Difference]: With dead ends: 150 [2021-06-12 19:54:06,742 INFO L226 Difference]: Without dead ends: 144 [2021-06-12 19:54:06,742 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 244.7ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:54:06,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-12 19:54:06,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 115. [2021-06-12 19:54:06,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.175438596491228) internal successors, (248), 114 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:06,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 248 transitions. [2021-06-12 19:54:06,744 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 248 transitions. Word has length 17 [2021-06-12 19:54:06,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:06,744 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 248 transitions. [2021-06-12 19:54:06,744 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) [2021-06-12 19:54:06,744 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 248 transitions. [2021-06-12 19:54:06,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:06,744 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:06,744 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:06,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable685 [2021-06-12 19:54:06,945 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:06,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:06,945 INFO L82 PathProgramCache]: Analyzing trace with hash -235511449, now seen corresponding path program 116 times [2021-06-12 19:54:06,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:06,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362319114] [2021-06-12 19:54:06,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:07,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:07,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362319114] [2021-06-12 19:54:07,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362319114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:07,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465367637] [2021-06-12 19:54:07,059 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 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 [2021-06-12 19:54:07,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:07,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:07,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:07,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:07,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465367637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:07,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:07,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:07,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515567606] [2021-06-12 19:54:07,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:07,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:07,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:07,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:07,205 INFO L87 Difference]: Start difference. First operand 115 states and 248 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) [2021-06-12 19:54:07,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:07,307 INFO L93 Difference]: Finished difference Result 129 states and 273 transitions. [2021-06-12 19:54:07,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:54:07,307 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 [2021-06-12 19:54:07,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:07,307 INFO L225 Difference]: With dead ends: 129 [2021-06-12 19:54:07,307 INFO L226 Difference]: Without dead ends: 129 [2021-06-12 19:54:07,307 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 186.4ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:07,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-12 19:54:07,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 113. [2021-06-12 19:54:07,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1517857142857144) internal successors, (241), 112 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:07,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 241 transitions. [2021-06-12 19:54:07,309 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 241 transitions. Word has length 17 [2021-06-12 19:54:07,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:07,309 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 241 transitions. [2021-06-12 19:54:07,309 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) [2021-06-12 19:54:07,309 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 241 transitions. [2021-06-12 19:54:07,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:07,310 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:07,310 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:07,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:07,513 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:07,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:07,513 INFO L82 PathProgramCache]: Analyzing trace with hash -860676804, now seen corresponding path program 117 times [2021-06-12 19:54:07,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:07,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865171463] [2021-06-12 19:54:07,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:07,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:07,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:07,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865171463] [2021-06-12 19:54:07,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865171463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:07,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126320370] [2021-06-12 19:54:07,622 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 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 [2021-06-12 19:54:07,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:54:07,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:07,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:07,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:07,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:07,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126320370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:07,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:07,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:07,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019833588] [2021-06-12 19:54:07,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:07,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:07,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:07,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:07,807 INFO L87 Difference]: Start difference. First operand 113 states and 241 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) [2021-06-12 19:54:08,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:08,004 INFO L93 Difference]: Finished difference Result 127 states and 269 transitions. [2021-06-12 19:54:08,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:54:08,005 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 [2021-06-12 19:54:08,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:08,005 INFO L225 Difference]: With dead ends: 127 [2021-06-12 19:54:08,005 INFO L226 Difference]: Without dead ends: 127 [2021-06-12 19:54:08,005 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 255.2ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:54:08,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-12 19:54:08,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 113. [2021-06-12 19:54:08,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1517857142857144) internal successors, (241), 112 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:08,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 241 transitions. [2021-06-12 19:54:08,007 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 241 transitions. Word has length 17 [2021-06-12 19:54:08,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:08,007 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 241 transitions. [2021-06-12 19:54:08,007 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) [2021-06-12 19:54:08,007 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 241 transitions. [2021-06-12 19:54:08,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:08,007 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:08,007 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:08,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-06-12 19:54:08,208 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:08,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:08,208 INFO L82 PathProgramCache]: Analyzing trace with hash -63941052, now seen corresponding path program 118 times [2021-06-12 19:54:08,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:08,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169928686] [2021-06-12 19:54:08,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:08,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:08,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169928686] [2021-06-12 19:54:08,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169928686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:08,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349827366] [2021-06-12 19:54:08,300 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 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 [2021-06-12 19:54:08,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:54:08,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:08,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:08,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:08,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349827366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:08,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:08,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:08,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945144940] [2021-06-12 19:54:08,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:08,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:08,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:08,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:08,457 INFO L87 Difference]: Start difference. First operand 113 states and 241 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) [2021-06-12 19:54:08,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:08,580 INFO L93 Difference]: Finished difference Result 137 states and 289 transitions. [2021-06-12 19:54:08,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:54:08,580 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 [2021-06-12 19:54:08,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:08,581 INFO L225 Difference]: With dead ends: 137 [2021-06-12 19:54:08,581 INFO L226 Difference]: Without dead ends: 137 [2021-06-12 19:54:08,581 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 179.9ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:54:08,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-12 19:54:08,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 113. [2021-06-12 19:54:08,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1517857142857144) internal successors, (241), 112 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:08,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 241 transitions. [2021-06-12 19:54:08,582 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 241 transitions. Word has length 17 [2021-06-12 19:54:08,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:08,582 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 241 transitions. [2021-06-12 19:54:08,582 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) [2021-06-12 19:54:08,582 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 241 transitions. [2021-06-12 19:54:08,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:08,582 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:08,582 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:08,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-06-12 19:54:08,783 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:08,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:08,783 INFO L82 PathProgramCache]: Analyzing trace with hash 223609183, now seen corresponding path program 119 times [2021-06-12 19:54:08,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:08,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187040837] [2021-06-12 19:54:08,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:08,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:08,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187040837] [2021-06-12 19:54:08,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187040837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:08,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386438915] [2021-06-12 19:54:08,900 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 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 [2021-06-12 19:54:08,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:54:08,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:08,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:08,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:09,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386438915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:09,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:09,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:09,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116002561] [2021-06-12 19:54:09,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:09,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:09,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:09,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:09,159 INFO L87 Difference]: Start difference. First operand 113 states and 241 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) [2021-06-12 19:54:09,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:09,266 INFO L93 Difference]: Finished difference Result 122 states and 259 transitions. [2021-06-12 19:54:09,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:54:09,266 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 [2021-06-12 19:54:09,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:09,266 INFO L225 Difference]: With dead ends: 122 [2021-06-12 19:54:09,266 INFO L226 Difference]: Without dead ends: 122 [2021-06-12 19:54:09,266 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 290.2ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:54:09,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-12 19:54:09,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 110. [2021-06-12 19:54:09,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:09,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-06-12 19:54:09,268 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 17 [2021-06-12 19:54:09,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:09,268 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-06-12 19:54:09,268 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) [2021-06-12 19:54:09,268 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-06-12 19:54:09,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:09,268 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:09,268 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:09,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:09,469 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:09,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:09,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1569801307, now seen corresponding path program 120 times [2021-06-12 19:54:09,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:09,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207318322] [2021-06-12 19:54:09,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:09,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:09,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:09,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207318322] [2021-06-12 19:54:09,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207318322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:09,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687643948] [2021-06-12 19:54:09,562 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 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 [2021-06-12 19:54:09,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:54:09,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:09,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:09,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:09,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:09,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687643948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:09,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:09,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:09,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722332518] [2021-06-12 19:54:09,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:09,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:09,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:09,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:09,719 INFO L87 Difference]: Start difference. First operand 110 states and 233 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) [2021-06-12 19:54:09,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:09,931 INFO L93 Difference]: Finished difference Result 147 states and 302 transitions. [2021-06-12 19:54:09,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:54:09,932 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 [2021-06-12 19:54:09,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:09,932 INFO L225 Difference]: With dead ends: 147 [2021-06-12 19:54:09,932 INFO L226 Difference]: Without dead ends: 147 [2021-06-12 19:54:09,932 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 287.3ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:54:09,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-12 19:54:09,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 116. [2021-06-12 19:54:09,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1478260869565218) internal successors, (247), 115 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:09,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 247 transitions. [2021-06-12 19:54:09,934 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 247 transitions. Word has length 17 [2021-06-12 19:54:09,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:09,934 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 247 transitions. [2021-06-12 19:54:09,934 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) [2021-06-12 19:54:09,934 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 247 transitions. [2021-06-12 19:54:09,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:09,934 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:09,934 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:10,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:10,137 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:10,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:10,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1031945729, now seen corresponding path program 121 times [2021-06-12 19:54:10,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:10,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847421345] [2021-06-12 19:54:10,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:10,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:10,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847421345] [2021-06-12 19:54:10,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847421345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:10,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552507105] [2021-06-12 19:54:10,260 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 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 [2021-06-12 19:54:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:10,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:10,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:10,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:10,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552507105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:10,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:10,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:10,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988634306] [2021-06-12 19:54:10,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:10,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:10,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:10,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:10,446 INFO L87 Difference]: Start difference. First operand 116 states and 247 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) [2021-06-12 19:54:10,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:10,592 INFO L93 Difference]: Finished difference Result 128 states and 269 transitions. [2021-06-12 19:54:10,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:54:10,593 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 [2021-06-12 19:54:10,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:10,593 INFO L225 Difference]: With dead ends: 128 [2021-06-12 19:54:10,593 INFO L226 Difference]: Without dead ends: 128 [2021-06-12 19:54:10,593 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 258.2ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:54:10,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-12 19:54:10,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 112. [2021-06-12 19:54:10,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.135135135135135) internal successors, (237), 111 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:10,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 237 transitions. [2021-06-12 19:54:10,595 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 237 transitions. Word has length 17 [2021-06-12 19:54:10,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:10,595 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 237 transitions. [2021-06-12 19:54:10,595 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) [2021-06-12 19:54:10,595 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 237 transitions. [2021-06-12 19:54:10,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:10,596 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:10,596 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:10,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:10,801 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:10,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:10,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1247924961, now seen corresponding path program 122 times [2021-06-12 19:54:10,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:10,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374169231] [2021-06-12 19:54:10,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:10,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:10,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374169231] [2021-06-12 19:54:10,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374169231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:10,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482349459] [2021-06-12 19:54:10,865 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 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 [2021-06-12 19:54:10,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:10,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:10,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:10,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:11,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482349459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:11,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:11,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:11,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940738422] [2021-06-12 19:54:11,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:11,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:11,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:11,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:11,007 INFO L87 Difference]: Start difference. First operand 112 states and 237 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) [2021-06-12 19:54:11,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:11,290 INFO L93 Difference]: Finished difference Result 141 states and 287 transitions. [2021-06-12 19:54:11,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:54:11,290 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 [2021-06-12 19:54:11,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:11,291 INFO L225 Difference]: With dead ends: 141 [2021-06-12 19:54:11,291 INFO L226 Difference]: Without dead ends: 139 [2021-06-12 19:54:11,291 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 313.5ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:54:11,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-12 19:54:11,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 117. [2021-06-12 19:54:11,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.146551724137931) internal successors, (249), 116 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:11,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 249 transitions. [2021-06-12 19:54:11,292 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 249 transitions. Word has length 17 [2021-06-12 19:54:11,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:11,293 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 249 transitions. [2021-06-12 19:54:11,293 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) [2021-06-12 19:54:11,293 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 249 transitions. [2021-06-12 19:54:11,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:11,293 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:11,293 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:11,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable716,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:11,493 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:11,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:11,494 INFO L82 PathProgramCache]: Analyzing trace with hash 86666369, now seen corresponding path program 123 times [2021-06-12 19:54:11,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:11,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096648309] [2021-06-12 19:54:11,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:11,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:11,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:11,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096648309] [2021-06-12 19:54:11,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096648309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:11,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942150651] [2021-06-12 19:54:11,567 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 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 [2021-06-12 19:54:11,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:54:11,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:11,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:11,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:11,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:11,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942150651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:11,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:11,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:11,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198337290] [2021-06-12 19:54:11,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:11,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:11,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:11,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:11,713 INFO L87 Difference]: Start difference. First operand 117 states and 249 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) [2021-06-12 19:54:12,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:12,036 INFO L93 Difference]: Finished difference Result 147 states and 301 transitions. [2021-06-12 19:54:12,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:54:12,037 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 [2021-06-12 19:54:12,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:12,037 INFO L225 Difference]: With dead ends: 147 [2021-06-12 19:54:12,037 INFO L226 Difference]: Without dead ends: 147 [2021-06-12 19:54:12,037 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 353.6ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:54:12,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-12 19:54:12,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 117. [2021-06-12 19:54:12,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.146551724137931) internal successors, (249), 116 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:12,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 249 transitions. [2021-06-12 19:54:12,039 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 249 transitions. Word has length 17 [2021-06-12 19:54:12,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:12,039 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 249 transitions. [2021-06-12 19:54:12,039 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) [2021-06-12 19:54:12,039 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 249 transitions. [2021-06-12 19:54:12,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:12,039 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:12,039 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:12,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable722 [2021-06-12 19:54:12,240 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:12,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:12,240 INFO L82 PathProgramCache]: Analyzing trace with hash -451189209, now seen corresponding path program 124 times [2021-06-12 19:54:12,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:12,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209816136] [2021-06-12 19:54:12,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:12,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:12,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:12,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209816136] [2021-06-12 19:54:12,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209816136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:12,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834877231] [2021-06-12 19:54:12,306 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 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 [2021-06-12 19:54:12,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:54:12,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:12,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:12,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:12,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834877231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:12,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:12,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:12,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771024603] [2021-06-12 19:54:12,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:12,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:12,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:12,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:12,448 INFO L87 Difference]: Start difference. First operand 117 states and 249 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) [2021-06-12 19:54:12,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:12,708 INFO L93 Difference]: Finished difference Result 139 states and 291 transitions. [2021-06-12 19:54:12,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:54:12,709 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 [2021-06-12 19:54:12,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:12,709 INFO L225 Difference]: With dead ends: 139 [2021-06-12 19:54:12,709 INFO L226 Difference]: Without dead ends: 139 [2021-06-12 19:54:12,709 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 308.9ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:54:12,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-12 19:54:12,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 117. [2021-06-12 19:54:12,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.146551724137931) internal successors, (249), 116 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:12,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 249 transitions. [2021-06-12 19:54:12,711 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 249 transitions. Word has length 17 [2021-06-12 19:54:12,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:12,711 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 249 transitions. [2021-06-12 19:54:12,711 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) [2021-06-12 19:54:12,711 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 249 transitions. [2021-06-12 19:54:12,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:12,711 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:12,711 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:12,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:12,911 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:12,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:12,912 INFO L82 PathProgramCache]: Analyzing trace with hash 55157057, now seen corresponding path program 125 times [2021-06-12 19:54:12,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:12,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138731669] [2021-06-12 19:54:12,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:12,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:12,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138731669] [2021-06-12 19:54:12,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138731669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:12,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271444443] [2021-06-12 19:54:12,976 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 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 [2021-06-12 19:54:13,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:54:13,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:13,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:13,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:13,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271444443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:13,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:13,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:54:13,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79373023] [2021-06-12 19:54:13,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:54:13,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:13,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:54:13,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:54:13,125 INFO L87 Difference]: Start difference. First operand 117 states and 249 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) [2021-06-12 19:54:13,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:13,320 INFO L93 Difference]: Finished difference Result 132 states and 276 transitions. [2021-06-12 19:54:13,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:54:13,320 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 17 [2021-06-12 19:54:13,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:13,321 INFO L225 Difference]: With dead ends: 132 [2021-06-12 19:54:13,321 INFO L226 Difference]: Without dead ends: 132 [2021-06-12 19:54:13,321 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 236.8ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:54:13,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-06-12 19:54:13,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 112. [2021-06-12 19:54:13,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.126126126126126) internal successors, (236), 111 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:13,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 236 transitions. [2021-06-12 19:54:13,322 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 236 transitions. Word has length 17 [2021-06-12 19:54:13,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:13,322 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 236 transitions. [2021-06-12 19:54:13,322 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) [2021-06-12 19:54:13,322 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 236 transitions. [2021-06-12 19:54:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:13,322 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:13,323 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:13,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-06-12 19:54:13,523 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:13,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:13,523 INFO L82 PathProgramCache]: Analyzing trace with hash -436365568, now seen corresponding path program 126 times [2021-06-12 19:54:13,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:13,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253507978] [2021-06-12 19:54:13,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:13,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:13,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253507978] [2021-06-12 19:54:13,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253507978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:13,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343744465] [2021-06-12 19:54:13,622 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 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 [2021-06-12 19:54:13,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:54:13,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:13,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:13,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:13,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343744465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:13,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:13,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:13,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683890721] [2021-06-12 19:54:13,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:13,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:13,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:13,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:13,769 INFO L87 Difference]: Start difference. First operand 112 states and 236 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) [2021-06-12 19:54:13,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:13,948 INFO L93 Difference]: Finished difference Result 126 states and 264 transitions. [2021-06-12 19:54:13,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:54:13,948 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 [2021-06-12 19:54:13,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:13,949 INFO L225 Difference]: With dead ends: 126 [2021-06-12 19:54:13,949 INFO L226 Difference]: Without dead ends: 126 [2021-06-12 19:54:13,949 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 241.9ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:13,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-12 19:54:13,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2021-06-12 19:54:13,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.126126126126126) internal successors, (236), 111 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:13,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 236 transitions. [2021-06-12 19:54:13,950 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 236 transitions. Word has length 17 [2021-06-12 19:54:13,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:13,950 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 236 transitions. [2021-06-12 19:54:13,950 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) [2021-06-12 19:54:13,950 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 236 transitions. [2021-06-12 19:54:13,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:13,950 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:13,950 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:14,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable733,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:14,151 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:14,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:14,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1487766277, now seen corresponding path program 127 times [2021-06-12 19:54:14,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:14,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346472874] [2021-06-12 19:54:14,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:14,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:14,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346472874] [2021-06-12 19:54:14,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346472874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:14,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346189342] [2021-06-12 19:54:14,245 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 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 [2021-06-12 19:54:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:14,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:14,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:14,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:14,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346189342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:14,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:14,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:14,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458479956] [2021-06-12 19:54:14,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:14,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:14,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:14,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:14,460 INFO L87 Difference]: Start difference. First operand 112 states and 236 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) [2021-06-12 19:54:14,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:14,622 INFO L93 Difference]: Finished difference Result 120 states and 252 transitions. [2021-06-12 19:54:14,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:54:14,622 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 [2021-06-12 19:54:14,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:14,622 INFO L225 Difference]: With dead ends: 120 [2021-06-12 19:54:14,622 INFO L226 Difference]: Without dead ends: 120 [2021-06-12 19:54:14,622 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:14,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-12 19:54:14,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2021-06-12 19:54:14,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.128440366972477) internal successors, (232), 109 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:14,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 232 transitions. [2021-06-12 19:54:14,623 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 232 transitions. Word has length 17 [2021-06-12 19:54:14,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:14,624 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 232 transitions. [2021-06-12 19:54:14,624 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) [2021-06-12 19:54:14,624 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 232 transitions. [2021-06-12 19:54:14,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:14,624 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:14,624 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:14,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable736 [2021-06-12 19:54:14,837 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:14,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:14,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1994112543, now seen corresponding path program 128 times [2021-06-12 19:54:14,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:14,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292900988] [2021-06-12 19:54:14,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:14,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:14,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:14,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292900988] [2021-06-12 19:54:14,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292900988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:14,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509754404] [2021-06-12 19:54:14,929 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 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 [2021-06-12 19:54:14,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:14,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:14,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:14,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:15,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:15,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509754404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:15,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:15,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:15,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585139531] [2021-06-12 19:54:15,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:15,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:15,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:15,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:15,091 INFO L87 Difference]: Start difference. First operand 110 states and 232 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) [2021-06-12 19:54:15,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:15,263 INFO L93 Difference]: Finished difference Result 145 states and 297 transitions. [2021-06-12 19:54:15,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:54:15,263 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 [2021-06-12 19:54:15,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:15,263 INFO L225 Difference]: With dead ends: 145 [2021-06-12 19:54:15,263 INFO L226 Difference]: Without dead ends: 145 [2021-06-12 19:54:15,263 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 217.1ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:15,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-12 19:54:15,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 113. [2021-06-12 19:54:15,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.142857142857143) internal successors, (240), 112 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:15,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 240 transitions. [2021-06-12 19:54:15,265 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 240 transitions. Word has length 17 [2021-06-12 19:54:15,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:15,265 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 240 transitions. [2021-06-12 19:54:15,266 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) [2021-06-12 19:54:15,266 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 240 transitions. [2021-06-12 19:54:15,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:15,266 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:15,266 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:15,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-06-12 19:54:15,481 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:15,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:15,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1456256965, now seen corresponding path program 129 times [2021-06-12 19:54:15,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:15,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85470960] [2021-06-12 19:54:15,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:15,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:15,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:15,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85470960] [2021-06-12 19:54:15,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85470960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:15,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313925701] [2021-06-12 19:54:15,575 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 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 [2021-06-12 19:54:15,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:54:15,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:15,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:15,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:15,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313925701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:15,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:15,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:15,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219896390] [2021-06-12 19:54:15,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:15,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:15,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:15,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:15,721 INFO L87 Difference]: Start difference. First operand 113 states and 240 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) [2021-06-12 19:54:15,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:15,876 INFO L93 Difference]: Finished difference Result 129 states and 270 transitions. [2021-06-12 19:54:15,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:54:15,877 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 [2021-06-12 19:54:15,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:15,877 INFO L225 Difference]: With dead ends: 129 [2021-06-12 19:54:15,877 INFO L226 Difference]: Without dead ends: 129 [2021-06-12 19:54:15,877 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 199.2ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:54:15,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-12 19:54:15,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 108. [2021-06-12 19:54:15,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.130841121495327) internal successors, (228), 107 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:15,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 228 transitions. [2021-06-12 19:54:15,879 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 228 transitions. Word has length 17 [2021-06-12 19:54:15,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:15,879 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 228 transitions. [2021-06-12 19:54:15,879 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) [2021-06-12 19:54:15,879 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 228 transitions. [2021-06-12 19:54:15,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:15,879 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:15,879 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:16,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable747,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:16,080 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:16,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:16,080 INFO L82 PathProgramCache]: Analyzing trace with hash -616418488, now seen corresponding path program 130 times [2021-06-12 19:54:16,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:16,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956088709] [2021-06-12 19:54:16,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:16,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:16,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956088709] [2021-06-12 19:54:16,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956088709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:16,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975510929] [2021-06-12 19:54:16,143 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 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 [2021-06-12 19:54:16,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:54:16,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:16,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:16,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:16,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975510929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:16,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:16,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:16,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536667874] [2021-06-12 19:54:16,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:16,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:16,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:16,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:16,377 INFO L87 Difference]: Start difference. First operand 108 states and 228 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) [2021-06-12 19:54:16,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:16,455 INFO L93 Difference]: Finished difference Result 111 states and 234 transitions. [2021-06-12 19:54:16,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:54:16,456 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 [2021-06-12 19:54:16,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:16,456 INFO L225 Difference]: With dead ends: 111 [2021-06-12 19:54:16,456 INFO L226 Difference]: Without dead ends: 111 [2021-06-12 19:54:16,456 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 187.9ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:16,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-12 19:54:16,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2021-06-12 19:54:16,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.130841121495327) internal successors, (228), 107 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:16,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 228 transitions. [2021-06-12 19:54:16,458 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 228 transitions. Word has length 17 [2021-06-12 19:54:16,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:16,458 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 228 transitions. [2021-06-12 19:54:16,458 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) [2021-06-12 19:54:16,458 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 228 transitions. [2021-06-12 19:54:16,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:16,459 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:16,459 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:16,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable750,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:16,661 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:16,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:16,661 INFO L82 PathProgramCache]: Analyzing trace with hash -328868253, now seen corresponding path program 131 times [2021-06-12 19:54:16,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:16,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364736817] [2021-06-12 19:54:16,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:16,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:16,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364736817] [2021-06-12 19:54:16,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364736817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:16,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18850381] [2021-06-12 19:54:16,734 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 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 [2021-06-12 19:54:16,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:54:16,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:16,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:16,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:16,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:16,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18850381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:16,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:16,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:16,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008309442] [2021-06-12 19:54:16,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:16,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:16,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:16,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:16,888 INFO L87 Difference]: Start difference. First operand 108 states and 228 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) [2021-06-12 19:54:17,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:17,076 INFO L93 Difference]: Finished difference Result 146 states and 291 transitions. [2021-06-12 19:54:17,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:54:17,077 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 [2021-06-12 19:54:17,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:17,077 INFO L225 Difference]: With dead ends: 146 [2021-06-12 19:54:17,077 INFO L226 Difference]: Without dead ends: 146 [2021-06-12 19:54:17,077 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 218.9ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:54:17,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-12 19:54:17,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 113. [2021-06-12 19:54:17,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.142857142857143) internal successors, (240), 112 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 240 transitions. [2021-06-12 19:54:17,078 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 240 transitions. Word has length 17 [2021-06-12 19:54:17,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:17,078 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 240 transitions. [2021-06-12 19:54:17,079 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) [2021-06-12 19:54:17,079 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 240 transitions. [2021-06-12 19:54:17,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:17,079 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:17,079 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:17,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable756 [2021-06-12 19:54:17,279 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:17,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:17,280 INFO L82 PathProgramCache]: Analyzing trace with hash -26877973, now seen corresponding path program 132 times [2021-06-12 19:54:17,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:17,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761664995] [2021-06-12 19:54:17,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:17,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:17,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761664995] [2021-06-12 19:54:17,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761664995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:17,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954777125] [2021-06-12 19:54:17,350 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 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 [2021-06-12 19:54:17,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:54:17,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:17,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:17,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:17,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954777125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:17,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:17,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:17,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339451563] [2021-06-12 19:54:17,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:17,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:17,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:17,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:17,531 INFO L87 Difference]: Start difference. First operand 113 states and 240 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) [2021-06-12 19:54:17,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:17,629 INFO L93 Difference]: Finished difference Result 135 states and 282 transitions. [2021-06-12 19:54:17,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:54:17,629 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 [2021-06-12 19:54:17,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:17,629 INFO L225 Difference]: With dead ends: 135 [2021-06-12 19:54:17,629 INFO L226 Difference]: Without dead ends: 135 [2021-06-12 19:54:17,630 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:17,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-12 19:54:17,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2021-06-12 19:54:17,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.144144144144144) internal successors, (238), 111 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:17,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 238 transitions. [2021-06-12 19:54:17,631 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 238 transitions. Word has length 17 [2021-06-12 19:54:17,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:17,631 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 238 transitions. [2021-06-12 19:54:17,631 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) [2021-06-12 19:54:17,631 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 238 transitions. [2021-06-12 19:54:17,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:17,631 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:17,631 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:17,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-06-12 19:54:17,832 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:17,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:17,832 INFO L82 PathProgramCache]: Analyzing trace with hash 479468293, now seen corresponding path program 133 times [2021-06-12 19:54:17,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:17,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762780676] [2021-06-12 19:54:17,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:17,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:17,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:17,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762780676] [2021-06-12 19:54:17,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762780676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:17,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555159010] [2021-06-12 19:54:17,900 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 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 [2021-06-12 19:54:17,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:17,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:17,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:18,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555159010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:18,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:18,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:54:18,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538222885] [2021-06-12 19:54:18,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:54:18,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:18,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:54:18,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:54:18,045 INFO L87 Difference]: Start difference. First operand 112 states and 238 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) [2021-06-12 19:54:18,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:18,233 INFO L93 Difference]: Finished difference Result 125 states and 260 transitions. [2021-06-12 19:54:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:54:18,234 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 17 [2021-06-12 19:54:18,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:18,234 INFO L225 Difference]: With dead ends: 125 [2021-06-12 19:54:18,234 INFO L226 Difference]: Without dead ends: 125 [2021-06-12 19:54:18,234 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 242.5ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:54:18,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-12 19:54:18,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2021-06-12 19:54:18,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.116504854368932) internal successors, (218), 103 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:18,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 218 transitions. [2021-06-12 19:54:18,235 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 218 transitions. Word has length 17 [2021-06-12 19:54:18,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:18,236 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 218 transitions. [2021-06-12 19:54:18,236 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) [2021-06-12 19:54:18,236 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 218 transitions. [2021-06-12 19:54:18,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:18,236 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:18,236 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:18,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable764 [2021-06-12 19:54:18,436 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:18,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:18,437 INFO L82 PathProgramCache]: Analyzing trace with hash 21357727, now seen corresponding path program 134 times [2021-06-12 19:54:18,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:18,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407611840] [2021-06-12 19:54:18,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:18,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:18,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407611840] [2021-06-12 19:54:18,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407611840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:18,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105532227] [2021-06-12 19:54:18,495 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 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 [2021-06-12 19:54:18,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:18,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:18,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:18,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:18,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105532227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:18,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:18,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:18,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370193241] [2021-06-12 19:54:18,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:18,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:18,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:18,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:18,640 INFO L87 Difference]: Start difference. First operand 104 states and 218 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) [2021-06-12 19:54:18,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:18,806 INFO L93 Difference]: Finished difference Result 156 states and 309 transitions. [2021-06-12 19:54:18,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:54:18,806 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 [2021-06-12 19:54:18,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:18,807 INFO L225 Difference]: With dead ends: 156 [2021-06-12 19:54:18,807 INFO L226 Difference]: Without dead ends: 154 [2021-06-12 19:54:18,807 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 207.3ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:54:18,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-12 19:54:18,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 112. [2021-06-12 19:54:18,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.135135135135135) internal successors, (237), 111 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:18,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 237 transitions. [2021-06-12 19:54:18,808 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 237 transitions. Word has length 17 [2021-06-12 19:54:18,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:18,809 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 237 transitions. [2021-06-12 19:54:18,809 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) [2021-06-12 19:54:18,809 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 237 transitions. [2021-06-12 19:54:18,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:18,809 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:18,809 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:19,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable767,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:19,033 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:19,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:19,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1355949057, now seen corresponding path program 135 times [2021-06-12 19:54:19,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:19,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840198536] [2021-06-12 19:54:19,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:19,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:19,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840198536] [2021-06-12 19:54:19,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840198536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:19,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658005235] [2021-06-12 19:54:19,099 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 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 [2021-06-12 19:54:19,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:54:19,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:19,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:19,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:19,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:19,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658005235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:19,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:19,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:19,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956460358] [2021-06-12 19:54:19,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:19,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:19,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:19,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:19,252 INFO L87 Difference]: Start difference. First operand 112 states and 237 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) [2021-06-12 19:54:19,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:19,486 INFO L93 Difference]: Finished difference Result 158 states and 315 transitions. [2021-06-12 19:54:19,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:54:19,486 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 [2021-06-12 19:54:19,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:19,486 INFO L225 Difference]: With dead ends: 158 [2021-06-12 19:54:19,486 INFO L226 Difference]: Without dead ends: 158 [2021-06-12 19:54:19,486 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 274.8ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:54:19,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-12 19:54:19,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 111. [2021-06-12 19:54:19,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1363636363636362) internal successors, (235), 110 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:19,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 235 transitions. [2021-06-12 19:54:19,488 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 235 transitions. Word has length 17 [2021-06-12 19:54:19,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:19,488 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 235 transitions. [2021-06-12 19:54:19,488 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) [2021-06-12 19:54:19,488 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 235 transitions. [2021-06-12 19:54:19,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:19,488 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:19,488 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:19,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable773 [2021-06-12 19:54:19,689 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:19,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:19,689 INFO L82 PathProgramCache]: Analyzing trace with hash 818093479, now seen corresponding path program 136 times [2021-06-12 19:54:19,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:19,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865426406] [2021-06-12 19:54:19,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:19,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:19,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865426406] [2021-06-12 19:54:19,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865426406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:19,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764497820] [2021-06-12 19:54:19,758 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 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 [2021-06-12 19:54:19,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:54:19,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:19,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:19,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:19,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764497820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:19,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:19,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:19,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055089677] [2021-06-12 19:54:19,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:19,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:19,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:19,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:19,899 INFO L87 Difference]: Start difference. First operand 111 states and 235 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) [2021-06-12 19:54:20,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:20,068 INFO L93 Difference]: Finished difference Result 157 states and 319 transitions. [2021-06-12 19:54:20,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:54:20,068 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 [2021-06-12 19:54:20,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:20,069 INFO L225 Difference]: With dead ends: 157 [2021-06-12 19:54:20,069 INFO L226 Difference]: Without dead ends: 157 [2021-06-12 19:54:20,069 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 198.7ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:20,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-12 19:54:20,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2021-06-12 19:54:20,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:20,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-06-12 19:54:20,070 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 17 [2021-06-12 19:54:20,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:20,070 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-06-12 19:54:20,070 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) [2021-06-12 19:54:20,070 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-06-12 19:54:20,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:20,071 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:20,071 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:20,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable778 [2021-06-12 19:54:20,293 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:20,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:20,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1324439745, now seen corresponding path program 137 times [2021-06-12 19:54:20,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:20,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493915082] [2021-06-12 19:54:20,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:20,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:20,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:20,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493915082] [2021-06-12 19:54:20,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493915082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:20,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109060599] [2021-06-12 19:54:20,367 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 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 [2021-06-12 19:54:20,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:54:20,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:20,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 19:54:20,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:20,811 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-12 19:54:21,047 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 19:54:21,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 19:54:21,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:21,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:21,100 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 19:54:21,100 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-06-12 19:54:21,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:21,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:21,139 INFO L518 ElimStorePlain]: Eliminatee scoreA vanished before elimination [2021-06-12 19:54:21,139 INFO L518 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2021-06-12 19:54:21,149 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 19:54:21,150 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-06-12 19:54:21,152 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:21,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:21,181 INFO L518 ElimStorePlain]: Eliminatee v_prenex_6 vanished before elimination [2021-06-12 19:54:21,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:54:21,187 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 9 variables, input treesize:115, output treesize:50 [2021-06-12 19:54:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:21,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109060599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:21,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:21,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:54:21,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017954291] [2021-06-12 19:54:21,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:54:21,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:21,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:54:21,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:54:21,250 INFO L87 Difference]: Start difference. First operand 110 states and 233 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) [2021-06-12 19:54:21,721 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-12 19:54:21,934 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-12 19:54:22,142 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-06-12 19:54:22,376 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-06-12 19:54:22,630 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-06-12 19:54:23,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:23,046 INFO L93 Difference]: Finished difference Result 205 states and 400 transitions. [2021-06-12 19:54:23,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:54:23,046 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 17 [2021-06-12 19:54:23,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:23,047 INFO L225 Difference]: With dead ends: 205 [2021-06-12 19:54:23,047 INFO L226 Difference]: Without dead ends: 205 [2021-06-12 19:54:23,047 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2079.3ms TimeCoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:54:23,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-12 19:54:23,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 109. [2021-06-12 19:54:23,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.138888888888889) internal successors, (231), 108 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:23,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 231 transitions. [2021-06-12 19:54:23,048 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 231 transitions. Word has length 17 [2021-06-12 19:54:23,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:23,048 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 231 transitions. [2021-06-12 19:54:23,048 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) [2021-06-12 19:54:23,048 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 231 transitions. [2021-06-12 19:54:23,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:23,049 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:23,049 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:23,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable781 [2021-06-12 19:54:23,249 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:23,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:23,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1767338885, now seen corresponding path program 138 times [2021-06-12 19:54:23,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:23,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094653382] [2021-06-12 19:54:23,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:23,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:23,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:23,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094653382] [2021-06-12 19:54:23,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094653382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:23,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990399231] [2021-06-12 19:54:23,330 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 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 [2021-06-12 19:54:23,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:54:23,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:23,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:23,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:23,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990399231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:23,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:23,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:54:23,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765548820] [2021-06-12 19:54:23,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:54:23,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:23,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:54:23,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:54:23,511 INFO L87 Difference]: Start difference. First operand 109 states and 231 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) [2021-06-12 19:54:23,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:23,794 INFO L93 Difference]: Finished difference Result 157 states and 318 transitions. [2021-06-12 19:54:23,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:54:23,794 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 17 [2021-06-12 19:54:23,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:23,795 INFO L225 Difference]: With dead ends: 157 [2021-06-12 19:54:23,795 INFO L226 Difference]: Without dead ends: 157 [2021-06-12 19:54:23,795 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 320.4ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:54:23,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-12 19:54:23,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 104. [2021-06-12 19:54:23,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.116504854368932) internal successors, (218), 103 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:23,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 218 transitions. [2021-06-12 19:54:23,796 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 218 transitions. Word has length 17 [2021-06-12 19:54:23,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:23,796 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 218 transitions. [2021-06-12 19:54:23,796 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) [2021-06-12 19:54:23,796 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 218 transitions. [2021-06-12 19:54:23,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:23,796 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:23,796 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:23,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable790,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:23,997 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:23,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:23,997 INFO L82 PathProgramCache]: Analyzing trace with hash 316048736, now seen corresponding path program 139 times [2021-06-12 19:54:23,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:23,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674993773] [2021-06-12 19:54:23,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:24,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:24,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:24,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674993773] [2021-06-12 19:54:24,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674993773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:24,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299745224] [2021-06-12 19:54:24,175 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 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 [2021-06-12 19:54:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:24,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:54:24,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:24,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299745224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:24,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:24,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:54:24,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133546044] [2021-06-12 19:54:24,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:54:24,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:24,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:54:24,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:54:24,608 INFO L87 Difference]: Start difference. First operand 104 states and 218 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) [2021-06-12 19:54:25,121 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 35 [2021-06-12 19:54:25,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:25,139 INFO L93 Difference]: Finished difference Result 167 states and 331 transitions. [2021-06-12 19:54:25,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:54:25,139 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 18 [2021-06-12 19:54:25,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:25,139 INFO L225 Difference]: With dead ends: 167 [2021-06-12 19:54:25,139 INFO L226 Difference]: Without dead ends: 150 [2021-06-12 19:54:25,140 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 827.7ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:54:25,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-12 19:54:25,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 105. [2021-06-12 19:54:25,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.1153846153846154) internal successors, (220), 104 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) [2021-06-12 19:54:25,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 220 transitions. [2021-06-12 19:54:25,141 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 220 transitions. Word has length 18 [2021-06-12 19:54:25,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:25,141 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 220 transitions. [2021-06-12 19:54:25,141 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) [2021-06-12 19:54:25,141 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 220 transitions. [2021-06-12 19:54:25,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:25,141 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:25,141 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:25,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable793 [2021-06-12 19:54:25,342 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:25,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:25,342 INFO L82 PathProgramCache]: Analyzing trace with hash -37090754, now seen corresponding path program 140 times [2021-06-12 19:54:25,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:25,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060118129] [2021-06-12 19:54:25,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:25,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:25,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060118129] [2021-06-12 19:54:25,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060118129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:25,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850645961] [2021-06-12 19:54:25,673 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 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 [2021-06-12 19:54:25,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:25,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:25,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:54:25,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:26,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850645961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:26,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:26,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:54:26,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914390040] [2021-06-12 19:54:26,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:54:26,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:26,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:54:26,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:54:26,090 INFO L87 Difference]: Start difference. First operand 105 states and 220 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) [2021-06-12 19:54:26,481 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-06-12 19:54:26,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:26,960 INFO L93 Difference]: Finished difference Result 166 states and 330 transitions. [2021-06-12 19:54:26,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:54:26,960 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 18 [2021-06-12 19:54:26,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:26,960 INFO L225 Difference]: With dead ends: 166 [2021-06-12 19:54:26,960 INFO L226 Difference]: Without dead ends: 151 [2021-06-12 19:54:26,961 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1280.6ms TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:54:26,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-12 19:54:26,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 106. [2021-06-12 19:54:26,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.1142857142857143) internal successors, (222), 105 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:26,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 222 transitions. [2021-06-12 19:54:26,962 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 222 transitions. Word has length 18 [2021-06-12 19:54:26,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:26,962 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 222 transitions. [2021-06-12 19:54:26,963 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) [2021-06-12 19:54:26,963 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 222 transitions. [2021-06-12 19:54:26,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:26,963 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:26,963 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:27,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable806,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:27,169 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:27,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:27,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1690044128, now seen corresponding path program 141 times [2021-06-12 19:54:27,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:27,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349156633] [2021-06-12 19:54:27,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:27,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:27,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349156633] [2021-06-12 19:54:27,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349156633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:27,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657237150] [2021-06-12 19:54:27,510 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 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 [2021-06-12 19:54:27,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:54:27,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:27,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 19:54:27,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:28,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657237150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:28,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:28,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:54:28,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970786170] [2021-06-12 19:54:28,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:54:28,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:28,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:54:28,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:54:28,002 INFO L87 Difference]: Start difference. First operand 106 states and 222 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) [2021-06-12 19:54:28,385 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-06-12 19:54:28,727 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2021-06-12 19:54:28,874 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-06-12 19:54:29,128 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 45 [2021-06-12 19:54:29,281 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-06-12 19:54:29,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:29,416 INFO L93 Difference]: Finished difference Result 187 states and 361 transitions. [2021-06-12 19:54:29,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:54:29,416 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 18 [2021-06-12 19:54:29,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:29,417 INFO L225 Difference]: With dead ends: 187 [2021-06-12 19:54:29,417 INFO L226 Difference]: Without dead ends: 180 [2021-06-12 19:54:29,417 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1855.5ms TimeCoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:54:29,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-12 19:54:29,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 107. [2021-06-12 19:54:29,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 106 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:29,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 225 transitions. [2021-06-12 19:54:29,418 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 225 transitions. Word has length 18 [2021-06-12 19:54:29,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:29,418 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 225 transitions. [2021-06-12 19:54:29,418 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) [2021-06-12 19:54:29,418 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 225 transitions. [2021-06-12 19:54:29,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:29,420 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:29,420 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:29,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable817,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:29,637 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:29,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:29,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1027581438, now seen corresponding path program 142 times [2021-06-12 19:54:29,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:29,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085509466] [2021-06-12 19:54:29,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:30,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:30,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085509466] [2021-06-12 19:54:30,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085509466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:30,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120934670] [2021-06-12 19:54:30,068 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 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 [2021-06-12 19:54:30,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:54:30,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:30,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:54:30,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:30,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:30,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120934670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:30,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:30,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:54:30,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621331231] [2021-06-12 19:54:30,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:54:30,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:30,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:54:30,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:54:30,622 INFO L87 Difference]: Start difference. First operand 107 states and 225 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) [2021-06-12 19:54:31,714 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 71 [2021-06-12 19:54:31,972 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 59 [2021-06-12 19:54:32,212 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 74 [2021-06-12 19:54:32,419 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2021-06-12 19:54:32,592 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 61 [2021-06-12 19:54:32,752 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 55 [2021-06-12 19:54:32,906 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 56 [2021-06-12 19:54:32,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:32,923 INFO L93 Difference]: Finished difference Result 207 states and 398 transitions. [2021-06-12 19:54:32,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:54:32,923 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 18 [2021-06-12 19:54:32,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:32,923 INFO L225 Difference]: With dead ends: 207 [2021-06-12 19:54:32,923 INFO L226 Difference]: Without dead ends: 181 [2021-06-12 19:54:32,923 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 2791.3ms TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 19:54:32,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-12 19:54:32,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 112. [2021-06-12 19:54:32,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.126126126126126) internal successors, (236), 111 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:32,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 236 transitions. [2021-06-12 19:54:32,925 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 236 transitions. Word has length 18 [2021-06-12 19:54:32,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:32,925 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 236 transitions. [2021-06-12 19:54:32,925 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) [2021-06-12 19:54:32,925 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 236 transitions. [2021-06-12 19:54:32,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:32,925 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:32,925 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:33,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable829,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:33,129 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:33,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:33,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2075337876, now seen corresponding path program 143 times [2021-06-12 19:54:33,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:33,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046709619] [2021-06-12 19:54:33,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:33,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:33,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046709619] [2021-06-12 19:54:33,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046709619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:33,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95372982] [2021-06-12 19:54:33,332 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 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 [2021-06-12 19:54:33,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:54:33,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:33,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:54:33,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:33,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:33,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95372982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:33,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:33,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:54:33,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689089399] [2021-06-12 19:54:33,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:54:33,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:33,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:54:33,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:54:33,743 INFO L87 Difference]: Start difference. First operand 112 states and 236 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) [2021-06-12 19:54:34,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:34,333 INFO L93 Difference]: Finished difference Result 137 states and 274 transitions. [2021-06-12 19:54:34,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:54:34,333 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 18 [2021-06-12 19:54:34,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:34,333 INFO L225 Difference]: With dead ends: 137 [2021-06-12 19:54:34,334 INFO L226 Difference]: Without dead ends: 122 [2021-06-12 19:54:34,334 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 867.9ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:54:34,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-12 19:54:34,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2021-06-12 19:54:34,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:34,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-06-12 19:54:34,335 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 18 [2021-06-12 19:54:34,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:34,335 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-06-12 19:54:34,335 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) [2021-06-12 19:54:34,335 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-06-12 19:54:34,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:34,335 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:34,335 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:34,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-06-12 19:54:34,537 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:34,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:34,537 INFO L82 PathProgramCache]: Analyzing trace with hash 422384502, now seen corresponding path program 144 times [2021-06-12 19:54:34,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:34,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838142070] [2021-06-12 19:54:34,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:34,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:34,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:34,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838142070] [2021-06-12 19:54:34,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838142070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:34,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277447147] [2021-06-12 19:54:34,765 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 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 [2021-06-12 19:54:34,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:54:34,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:34,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:54:34,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:35,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277447147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:35,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:35,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:54:35,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035783718] [2021-06-12 19:54:35,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:54:35,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:35,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:54:35,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:54:35,177 INFO L87 Difference]: Start difference. First operand 113 states and 238 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) [2021-06-12 19:54:35,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:35,855 INFO L93 Difference]: Finished difference Result 142 states and 291 transitions. [2021-06-12 19:54:35,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:54:35,855 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 18 [2021-06-12 19:54:35,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:35,855 INFO L225 Difference]: With dead ends: 142 [2021-06-12 19:54:35,856 INFO L226 Difference]: Without dead ends: 129 [2021-06-12 19:54:35,856 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 976.5ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:54:35,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-12 19:54:35,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 114. [2021-06-12 19:54:35,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.1238938053097347) internal successors, (240), 113 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:35,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 240 transitions. [2021-06-12 19:54:35,857 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 240 transitions. Word has length 18 [2021-06-12 19:54:35,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:35,857 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 240 transitions. [2021-06-12 19:54:35,857 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) [2021-06-12 19:54:35,857 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 240 transitions. [2021-06-12 19:54:35,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:35,857 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:35,857 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:36,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable851 [2021-06-12 19:54:36,058 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:36,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:36,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1154957228, now seen corresponding path program 145 times [2021-06-12 19:54:36,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:36,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99887446] [2021-06-12 19:54:36,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:36,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:36,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:36,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99887446] [2021-06-12 19:54:36,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99887446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:36,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269547902] [2021-06-12 19:54:36,275 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 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 [2021-06-12 19:54:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:36,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:54:36,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:36,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269547902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:36,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:36,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:54:36,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056856298] [2021-06-12 19:54:36,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:54:36,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:36,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:54:36,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:54:36,710 INFO L87 Difference]: Start difference. First operand 114 states and 240 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) [2021-06-12 19:54:37,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:37,609 INFO L93 Difference]: Finished difference Result 148 states and 296 transitions. [2021-06-12 19:54:37,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:54:37,609 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 18 [2021-06-12 19:54:37,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:37,609 INFO L225 Difference]: With dead ends: 148 [2021-06-12 19:54:37,609 INFO L226 Difference]: Without dead ends: 141 [2021-06-12 19:54:37,610 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1115.8ms TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:54:37,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-12 19:54:37,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 115. [2021-06-12 19:54:37,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1315789473684212) internal successors, (243), 114 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:37,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 243 transitions. [2021-06-12 19:54:37,611 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 243 transitions. Word has length 18 [2021-06-12 19:54:37,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:37,611 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 243 transitions. [2021-06-12 19:54:37,611 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) [2021-06-12 19:54:37,611 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 243 transitions. [2021-06-12 19:54:37,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:37,611 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:37,611 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:37,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable862 [2021-06-12 19:54:37,812 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:37,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:37,812 INFO L82 PathProgramCache]: Analyzing trace with hash 179634102, now seen corresponding path program 146 times [2021-06-12 19:54:37,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:37,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551041790] [2021-06-12 19:54:37,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:37,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:37,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:37,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551041790] [2021-06-12 19:54:37,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551041790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:37,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670952203] [2021-06-12 19:54:37,990 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 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 [2021-06-12 19:54:38,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:38,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:38,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:54:38,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:38,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670952203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:38,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:38,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:54:38,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962489496] [2021-06-12 19:54:38,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:54:38,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:38,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:54:38,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:54:38,411 INFO L87 Difference]: Start difference. First operand 115 states and 243 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) [2021-06-12 19:54:39,064 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2021-06-12 19:54:39,269 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2021-06-12 19:54:39,549 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-06-12 19:54:40,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:40,272 INFO L93 Difference]: Finished difference Result 249 states and 458 transitions. [2021-06-12 19:54:40,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:54:40,273 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 18 [2021-06-12 19:54:40,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:40,273 INFO L225 Difference]: With dead ends: 249 [2021-06-12 19:54:40,273 INFO L226 Difference]: Without dead ends: 212 [2021-06-12 19:54:40,273 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2021.0ms TimeCoverageRelationStatistics Valid=263, Invalid=1543, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 19:54:40,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-06-12 19:54:40,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 120. [2021-06-12 19:54:40,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1848739495798317) internal successors, (260), 119 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:40,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 260 transitions. [2021-06-12 19:54:40,275 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 260 transitions. Word has length 18 [2021-06-12 19:54:40,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:40,275 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 260 transitions. [2021-06-12 19:54:40,275 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) [2021-06-12 19:54:40,275 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 260 transitions. [2021-06-12 19:54:40,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:40,275 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:40,275 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:40,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable875 [2021-06-12 19:54:40,476 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:40,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:40,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1060750436, now seen corresponding path program 147 times [2021-06-12 19:54:40,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:40,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043824395] [2021-06-12 19:54:40,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:40,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:40,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043824395] [2021-06-12 19:54:40,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043824395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:40,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210720444] [2021-06-12 19:54:40,665 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 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 [2021-06-12 19:54:40,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:54:40,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:40,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:54:40,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:41,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210720444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:41,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:41,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:54:41,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894119942] [2021-06-12 19:54:41,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:54:41,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:41,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:54:41,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:54:41,067 INFO L87 Difference]: Start difference. First operand 120 states and 260 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) [2021-06-12 19:54:41,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:41,423 INFO L93 Difference]: Finished difference Result 146 states and 301 transitions. [2021-06-12 19:54:41,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:54:41,423 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 18 [2021-06-12 19:54:41,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:41,424 INFO L225 Difference]: With dead ends: 146 [2021-06-12 19:54:41,424 INFO L226 Difference]: Without dead ends: 133 [2021-06-12 19:54:41,424 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 679.7ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:54:41,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-12 19:54:41,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 124. [2021-06-12 19:54:41,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.178861788617886) internal successors, (268), 123 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) [2021-06-12 19:54:41,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 268 transitions. [2021-06-12 19:54:41,425 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 268 transitions. Word has length 18 [2021-06-12 19:54:41,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:41,425 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 268 transitions. [2021-06-12 19:54:41,425 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) [2021-06-12 19:54:41,425 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 268 transitions. [2021-06-12 19:54:41,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:41,426 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:41,426 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:41,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable888,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:41,626 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:41,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:41,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1656875130, now seen corresponding path program 148 times [2021-06-12 19:54:41,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:41,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787230646] [2021-06-12 19:54:41,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:41,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:41,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787230646] [2021-06-12 19:54:41,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787230646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:41,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398010809] [2021-06-12 19:54:41,831 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 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 [2021-06-12 19:54:41,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:54:41,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:41,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:54:41,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:42,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398010809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:42,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:42,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:54:42,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18521900] [2021-06-12 19:54:42,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:54:42,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:42,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:54:42,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:54:42,216 INFO L87 Difference]: Start difference. First operand 124 states and 268 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) [2021-06-12 19:54:42,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:42,926 INFO L93 Difference]: Finished difference Result 171 states and 342 transitions. [2021-06-12 19:54:42,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:54:42,927 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 18 [2021-06-12 19:54:42,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:42,927 INFO L225 Difference]: With dead ends: 171 [2021-06-12 19:54:42,927 INFO L226 Difference]: Without dead ends: 160 [2021-06-12 19:54:42,927 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 966.6ms TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:54:42,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-12 19:54:42,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 125. [2021-06-12 19:54:42,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.1774193548387095) internal successors, (270), 124 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:42,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 270 transitions. [2021-06-12 19:54:42,929 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 270 transitions. Word has length 18 [2021-06-12 19:54:42,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:42,929 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 270 transitions. [2021-06-12 19:54:42,929 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) [2021-06-12 19:54:42,930 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 270 transitions. [2021-06-12 19:54:42,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:42,930 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:42,930 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:43,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable899 [2021-06-12 19:54:43,145 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:43,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:43,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1303500836, now seen corresponding path program 149 times [2021-06-12 19:54:43,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:43,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760490924] [2021-06-12 19:54:43,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:43,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:43,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760490924] [2021-06-12 19:54:43,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760490924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:43,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599922856] [2021-06-12 19:54:43,312 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 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 [2021-06-12 19:54:43,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:54:43,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:43,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:54:43,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:43,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599922856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:43,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:43,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:54:43,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309952314] [2021-06-12 19:54:43,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:54:43,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:43,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:54:43,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:54:43,703 INFO L87 Difference]: Start difference. First operand 125 states and 270 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) [2021-06-12 19:54:44,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:44,613 INFO L93 Difference]: Finished difference Result 224 states and 435 transitions. [2021-06-12 19:54:44,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:54:44,613 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 18 [2021-06-12 19:54:44,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:44,613 INFO L225 Difference]: With dead ends: 224 [2021-06-12 19:54:44,614 INFO L226 Difference]: Without dead ends: 198 [2021-06-12 19:54:44,614 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1077.8ms TimeCoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:54:44,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-12 19:54:44,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 128. [2021-06-12 19:54:44,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.173228346456693) internal successors, (276), 127 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) [2021-06-12 19:54:44,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 276 transitions. [2021-06-12 19:54:44,615 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 276 transitions. Word has length 18 [2021-06-12 19:54:44,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:44,615 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 276 transitions. [2021-06-12 19:54:44,615 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) [2021-06-12 19:54:44,615 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 276 transitions. [2021-06-12 19:54:44,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:44,615 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:44,616 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:44,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable910 [2021-06-12 19:54:44,816 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:44,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:44,816 INFO L82 PathProgramCache]: Analyzing trace with hash -2131745900, now seen corresponding path program 150 times [2021-06-12 19:54:44,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:44,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61414205] [2021-06-12 19:54:44,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:44,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:45,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:45,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61414205] [2021-06-12 19:54:45,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61414205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:45,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502545209] [2021-06-12 19:54:45,046 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 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 [2021-06-12 19:54:45,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:54:45,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:45,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 19:54:45,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:45,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502545209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:45,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:45,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:54:45,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839926168] [2021-06-12 19:54:45,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:54:45,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:45,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:54:45,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:54:45,387 INFO L87 Difference]: Start difference. First operand 128 states and 276 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) [2021-06-12 19:54:46,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:46,489 INFO L93 Difference]: Finished difference Result 225 states and 449 transitions. [2021-06-12 19:54:46,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:54:46,489 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 18 [2021-06-12 19:54:46,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:46,490 INFO L225 Difference]: With dead ends: 225 [2021-06-12 19:54:46,490 INFO L226 Difference]: Without dead ends: 207 [2021-06-12 19:54:46,490 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1250.8ms TimeCoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:54:46,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-12 19:54:46,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 135. [2021-06-12 19:54:46,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1940298507462686) internal successors, (294), 134 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:46,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 294 transitions. [2021-06-12 19:54:46,492 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 294 transitions. Word has length 18 [2021-06-12 19:54:46,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:46,492 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 294 transitions. [2021-06-12 19:54:46,492 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) [2021-06-12 19:54:46,492 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 294 transitions. [2021-06-12 19:54:46,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:46,492 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:46,492 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:46,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable922,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:46,692 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:46,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:46,693 INFO L82 PathProgramCache]: Analyzing trace with hash -797154570, now seen corresponding path program 151 times [2021-06-12 19:54:46,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:46,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846638198] [2021-06-12 19:54:46,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:46,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:46,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846638198] [2021-06-12 19:54:46,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846638198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:46,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647380912] [2021-06-12 19:54:46,868 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 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 [2021-06-12 19:54:46,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:46,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:54:46,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:47,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647380912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:47,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:47,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:54:47,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870372665] [2021-06-12 19:54:47,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:54:47,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:47,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:54:47,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:54:47,270 INFO L87 Difference]: Start difference. First operand 135 states and 294 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) [2021-06-12 19:54:47,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:47,731 INFO L93 Difference]: Finished difference Result 198 states and 397 transitions. [2021-06-12 19:54:47,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:54:47,732 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 18 [2021-06-12 19:54:47,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:47,732 INFO L225 Difference]: With dead ends: 198 [2021-06-12 19:54:47,732 INFO L226 Difference]: Without dead ends: 179 [2021-06-12 19:54:47,732 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 678.7ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:54:47,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-12 19:54:47,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 137. [2021-06-12 19:54:47,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.2058823529411766) internal successors, (300), 136 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:47,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 300 transitions. [2021-06-12 19:54:47,734 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 300 transitions. Word has length 18 [2021-06-12 19:54:47,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:47,734 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 300 transitions. [2021-06-12 19:54:47,734 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) [2021-06-12 19:54:47,734 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 300 transitions. [2021-06-12 19:54:47,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:47,734 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:47,734 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:47,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable935 [2021-06-12 19:54:47,935 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:47,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:47,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1335010148, now seen corresponding path program 152 times [2021-06-12 19:54:47,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:47,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136074939] [2021-06-12 19:54:47,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:48,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:48,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136074939] [2021-06-12 19:54:48,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136074939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:48,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146288455] [2021-06-12 19:54:48,106 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 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 [2021-06-12 19:54:48,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:48,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:48,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:54:48,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:48,392 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 19:54:48,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:48,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146288455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:48,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:48,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:54:48,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900645683] [2021-06-12 19:54:48,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:54:48,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:48,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:54:48,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:54:48,551 INFO L87 Difference]: Start difference. First operand 137 states and 300 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) [2021-06-12 19:54:48,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:48,995 INFO L93 Difference]: Finished difference Result 206 states and 421 transitions. [2021-06-12 19:54:48,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:54:48,995 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 18 [2021-06-12 19:54:48,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:48,995 INFO L225 Difference]: With dead ends: 206 [2021-06-12 19:54:48,996 INFO L226 Difference]: Without dead ends: 187 [2021-06-12 19:54:48,996 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 679.9ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:54:48,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-12 19:54:48,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2021-06-12 19:54:48,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.210144927536232) internal successors, (305), 138 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:48,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 305 transitions. [2021-06-12 19:54:48,997 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 305 transitions. Word has length 18 [2021-06-12 19:54:49,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:49,000 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 305 transitions. [2021-06-12 19:54:49,000 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) [2021-06-12 19:54:49,001 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 305 transitions. [2021-06-12 19:54:49,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:49,001 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:49,001 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:49,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable948,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:49,207 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:49,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:49,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1158851330, now seen corresponding path program 153 times [2021-06-12 19:54:49,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:49,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133853992] [2021-06-12 19:54:49,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:49,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:49,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133853992] [2021-06-12 19:54:49,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133853992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:49,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3594723] [2021-06-12 19:54:49,513 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 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 [2021-06-12 19:54:49,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:54:49,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:49,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:54:49,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:49,899 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:49,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3594723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:49,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:49,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:54:49,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748276214] [2021-06-12 19:54:49,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:54:49,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:49,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:54:49,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:54:49,900 INFO L87 Difference]: Start difference. First operand 139 states and 305 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) [2021-06-12 19:54:50,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:50,463 INFO L93 Difference]: Finished difference Result 172 states and 355 transitions. [2021-06-12 19:54:50,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:54:50,463 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 18 [2021-06-12 19:54:50,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:50,464 INFO L225 Difference]: With dead ends: 172 [2021-06-12 19:54:50,464 INFO L226 Difference]: Without dead ends: 165 [2021-06-12 19:54:50,464 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 934.1ms TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:54:50,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-12 19:54:50,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 142. [2021-06-12 19:54:50,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.2056737588652484) internal successors, (311), 141 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:50,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 311 transitions. [2021-06-12 19:54:50,466 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 311 transitions. Word has length 18 [2021-06-12 19:54:50,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:50,466 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 311 transitions. [2021-06-12 19:54:50,466 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) [2021-06-12 19:54:50,466 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 311 transitions. [2021-06-12 19:54:50,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:50,466 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:50,467 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:50,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable960 [2021-06-12 19:54:50,681 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:50,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:50,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1483162592, now seen corresponding path program 154 times [2021-06-12 19:54:50,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:50,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142846427] [2021-06-12 19:54:50,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:50,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:50,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:50,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142846427] [2021-06-12 19:54:50,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142846427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:50,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583758304] [2021-06-12 19:54:50,908 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 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 [2021-06-12 19:54:50,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:54:50,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:50,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:54:50,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:51,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583758304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:51,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:51,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:54:51,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940853730] [2021-06-12 19:54:51,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:54:51,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:51,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:54:51,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:54:51,307 INFO L87 Difference]: Start difference. First operand 142 states and 311 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) [2021-06-12 19:54:52,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:52,119 INFO L93 Difference]: Finished difference Result 179 states and 367 transitions. [2021-06-12 19:54:52,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:54:52,120 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 18 [2021-06-12 19:54:52,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:52,120 INFO L225 Difference]: With dead ends: 179 [2021-06-12 19:54:52,120 INFO L226 Difference]: Without dead ends: 172 [2021-06-12 19:54:52,120 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1078.2ms TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:54:52,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-12 19:54:52,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 143. [2021-06-12 19:54:52,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.211267605633803) internal successors, (314), 142 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:52,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 314 transitions. [2021-06-12 19:54:52,122 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 314 transitions. Word has length 18 [2021-06-12 19:54:52,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:52,122 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 314 transitions. [2021-06-12 19:54:52,122 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) [2021-06-12 19:54:52,122 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 314 transitions. [2021-06-12 19:54:52,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:52,122 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:52,122 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:52,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable973 [2021-06-12 19:54:52,323 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:52,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:52,323 INFO L82 PathProgramCache]: Analyzing trace with hash -94179138, now seen corresponding path program 155 times [2021-06-12 19:54:52,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:52,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070818723] [2021-06-12 19:54:52,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:52,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:52,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:52,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070818723] [2021-06-12 19:54:52,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070818723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:52,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382616529] [2021-06-12 19:54:52,594 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 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 [2021-06-12 19:54:52,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:54:52,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:52,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:54:52,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:53,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382616529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:53,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:53,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:54:53,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137880395] [2021-06-12 19:54:53,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:54:53,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:53,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:54:53,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:54:53,029 INFO L87 Difference]: Start difference. First operand 143 states and 314 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) [2021-06-12 19:54:53,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:53,984 INFO L93 Difference]: Finished difference Result 193 states and 393 transitions. [2021-06-12 19:54:53,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:54:53,984 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 18 [2021-06-12 19:54:53,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:53,985 INFO L225 Difference]: With dead ends: 193 [2021-06-12 19:54:53,985 INFO L226 Difference]: Without dead ends: 167 [2021-06-12 19:54:53,985 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1248.6ms TimeCoverageRelationStatistics Valid=143, Invalid=1047, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:54:53,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-12 19:54:53,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 143. [2021-06-12 19:54:53,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.2183098591549295) internal successors, (315), 142 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:53,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 315 transitions. [2021-06-12 19:54:53,987 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 315 transitions. Word has length 18 [2021-06-12 19:54:53,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:53,987 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 315 transitions. [2021-06-12 19:54:53,987 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) [2021-06-12 19:54:53,987 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 315 transitions. [2021-06-12 19:54:53,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:53,988 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:53,988 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:54,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable986,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:54,210 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:54,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:54,211 INFO L82 PathProgramCache]: Analyzing trace with hash -242722746, now seen corresponding path program 156 times [2021-06-12 19:54:54,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:54,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554066656] [2021-06-12 19:54:54,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:54,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:54,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554066656] [2021-06-12 19:54:54,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554066656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:54,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869001664] [2021-06-12 19:54:54,357 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 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 [2021-06-12 19:54:54,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:54:54,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:54,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:54:54,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:54,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:54,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869001664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:54,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:54,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:54:54,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799338459] [2021-06-12 19:54:54,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:54:54,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:54,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:54:54,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:54:54,740 INFO L87 Difference]: Start difference. First operand 143 states and 315 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) [2021-06-12 19:54:55,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:55,526 INFO L93 Difference]: Finished difference Result 237 states and 471 transitions. [2021-06-12 19:54:55,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:54:55,526 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 18 [2021-06-12 19:54:55,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:55,526 INFO L225 Difference]: With dead ends: 237 [2021-06-12 19:54:55,526 INFO L226 Difference]: Without dead ends: 211 [2021-06-12 19:54:55,526 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 952.0ms TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:54:55,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-12 19:54:55,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 141. [2021-06-12 19:54:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.2214285714285715) internal successors, (311), 140 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:55,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 311 transitions. [2021-06-12 19:54:55,528 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 311 transitions. Word has length 18 [2021-06-12 19:54:55,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:55,528 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 311 transitions. [2021-06-12 19:54:55,528 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) [2021-06-12 19:54:55,528 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 311 transitions. [2021-06-12 19:54:55,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:55,528 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:55,528 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:55,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable997 [2021-06-12 19:54:55,733 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:55,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:55,733 INFO L82 PathProgramCache]: Analyzing trace with hash -863772573, now seen corresponding path program 157 times [2021-06-12 19:54:55,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:55,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120932957] [2021-06-12 19:54:55,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:55,815 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:54:55,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:55,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120932957] [2021-06-12 19:54:55,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120932957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:55,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136513279] [2021-06-12 19:54:55,815 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 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 [2021-06-12 19:54:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:55,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:55,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:54:55,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136513279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:55,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:55,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:54:55,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907389232] [2021-06-12 19:54:55,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:55,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:55,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:55,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:55,992 INFO L87 Difference]: Start difference. First operand 141 states and 311 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) [2021-06-12 19:54:56,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:56,148 INFO L93 Difference]: Finished difference Result 164 states and 354 transitions. [2021-06-12 19:54:56,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:54:56,148 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 18 [2021-06-12 19:54:56,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:56,149 INFO L225 Difference]: With dead ends: 164 [2021-06-12 19:54:56,149 INFO L226 Difference]: Without dead ends: 164 [2021-06-12 19:54:56,149 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 146.0ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:56,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-06-12 19:54:56,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 141. [2021-06-12 19:54:56,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.2142857142857144) internal successors, (310), 140 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:56,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 310 transitions. [2021-06-12 19:54:56,151 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 310 transitions. Word has length 18 [2021-06-12 19:54:56,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:56,151 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 310 transitions. [2021-06-12 19:54:56,151 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) [2021-06-12 19:54:56,151 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 310 transitions. [2021-06-12 19:54:56,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:56,151 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:56,151 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:56,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1010,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:56,352 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:56,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:56,352 INFO L82 PathProgramCache]: Analyzing trace with hash 263623520, now seen corresponding path program 158 times [2021-06-12 19:54:56,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:56,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464112333] [2021-06-12 19:54:56,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:56,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:56,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:56,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:56,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464112333] [2021-06-12 19:54:56,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464112333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:56,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120595696] [2021-06-12 19:54:56,509 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 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 [2021-06-12 19:54:56,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:56,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:56,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:54:56,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:56,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120595696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:56,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:56,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:54:56,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853969830] [2021-06-12 19:54:56,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:54:56,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:56,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:54:56,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:54:56,882 INFO L87 Difference]: Start difference. First operand 141 states and 310 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) [2021-06-12 19:54:57,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:57,469 INFO L93 Difference]: Finished difference Result 205 states and 413 transitions. [2021-06-12 19:54:57,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:54:57,469 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 18 [2021-06-12 19:54:57,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:57,469 INFO L225 Difference]: With dead ends: 205 [2021-06-12 19:54:57,469 INFO L226 Difference]: Without dead ends: 186 [2021-06-12 19:54:57,469 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 701.7ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:54:57,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-12 19:54:57,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 137. [2021-06-12 19:54:57,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.198529411764706) internal successors, (299), 136 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:57,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 299 transitions. [2021-06-12 19:54:57,471 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 299 transitions. Word has length 18 [2021-06-12 19:54:57,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:57,471 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 299 transitions. [2021-06-12 19:54:57,471 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) [2021-06-12 19:54:57,471 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 299 transitions. [2021-06-12 19:54:57,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:57,471 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:57,471 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:57,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1015 [2021-06-12 19:54:57,672 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:57,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:57,672 INFO L82 PathProgramCache]: Analyzing trace with hash -274232058, now seen corresponding path program 159 times [2021-06-12 19:54:57,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:57,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817964545] [2021-06-12 19:54:57,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:57,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:57,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:57,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817964545] [2021-06-12 19:54:57,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817964545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:57,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295515088] [2021-06-12 19:54:57,856 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 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 [2021-06-12 19:54:57,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:54:57,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:57,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 19:54:57,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:58,196 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 19:54:58,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:58,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295515088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:58,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:58,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:54:58,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867716801] [2021-06-12 19:54:58,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:54:58,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:58,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:54:58,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:54:58,330 INFO L87 Difference]: Start difference. First operand 137 states and 299 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) [2021-06-12 19:54:58,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:58,914 INFO L93 Difference]: Finished difference Result 209 states and 427 transitions. [2021-06-12 19:54:58,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:54:58,914 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 18 [2021-06-12 19:54:58,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:58,914 INFO L225 Difference]: With dead ends: 209 [2021-06-12 19:54:58,914 INFO L226 Difference]: Without dead ends: 190 [2021-06-12 19:54:58,914 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 866.0ms TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:54:58,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-12 19:54:58,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 135. [2021-06-12 19:54:58,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.201492537313433) internal successors, (295), 134 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:58,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 295 transitions. [2021-06-12 19:54:58,916 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 295 transitions. Word has length 18 [2021-06-12 19:54:58,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:58,916 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 295 transitions. [2021-06-12 19:54:58,916 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) [2021-06-12 19:54:58,916 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 295 transitions. [2021-06-12 19:54:58,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:54:58,916 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:58,916 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:59,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1028,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:59,117 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:59,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:59,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1267484832, now seen corresponding path program 160 times [2021-06-12 19:54:59,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:59,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238426577] [2021-06-12 19:54:59,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:59,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:59,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238426577] [2021-06-12 19:54:59,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238426577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:59,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723280557] [2021-06-12 19:54:59,348 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 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 [2021-06-12 19:54:59,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:54:59,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:59,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:54:59,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:59,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723280557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:59,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:59,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:54:59,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228689120] [2021-06-12 19:54:59,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:54:59,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:59,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:54:59,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:54:59,751 INFO L87 Difference]: Start difference. First operand 135 states and 295 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) [2021-06-12 19:55:00,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:00,191 INFO L93 Difference]: Finished difference Result 168 states and 346 transitions. [2021-06-12 19:55:00,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:55:00,192 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 18 [2021-06-12 19:55:00,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:00,192 INFO L225 Difference]: With dead ends: 168 [2021-06-12 19:55:00,192 INFO L226 Difference]: Without dead ends: 161 [2021-06-12 19:55:00,192 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 741.3ms TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:55:00,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-12 19:55:00,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2021-06-12 19:55:00,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.204379562043796) internal successors, (302), 137 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:00,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 302 transitions. [2021-06-12 19:55:00,194 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 302 transitions. Word has length 18 [2021-06-12 19:55:00,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:00,194 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 302 transitions. [2021-06-12 19:55:00,194 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) [2021-06-12 19:55:00,194 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 302 transitions. [2021-06-12 19:55:00,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:00,194 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:00,194 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:00,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1040,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:00,394 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:00,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:00,395 INFO L82 PathProgramCache]: Analyzing trace with hash -309856898, now seen corresponding path program 161 times [2021-06-12 19:55:00,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:00,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265819110] [2021-06-12 19:55:00,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:00,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:00,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:00,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265819110] [2021-06-12 19:55:00,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265819110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:00,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054978740] [2021-06-12 19:55:00,638 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 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 [2021-06-12 19:55:00,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:55:00,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:00,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:00,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:01,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054978740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:01,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:01,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:01,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332647593] [2021-06-12 19:55:01,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:01,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:01,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:01,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:01,049 INFO L87 Difference]: Start difference. First operand 138 states and 302 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) [2021-06-12 19:55:02,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:02,263 INFO L93 Difference]: Finished difference Result 214 states and 430 transitions. [2021-06-12 19:55:02,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:55:02,264 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 18 [2021-06-12 19:55:02,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:02,264 INFO L225 Difference]: With dead ends: 214 [2021-06-12 19:55:02,264 INFO L226 Difference]: Without dead ends: 190 [2021-06-12 19:55:02,264 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1436.5ms TimeCoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:55:02,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-12 19:55:02,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2021-06-12 19:55:02,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.2253521126760565) internal successors, (316), 142 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:02,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 316 transitions. [2021-06-12 19:55:02,266 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 316 transitions. Word has length 18 [2021-06-12 19:55:02,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:02,266 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 316 transitions. [2021-06-12 19:55:02,266 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) [2021-06-12 19:55:02,266 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 316 transitions. [2021-06-12 19:55:02,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:02,266 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:02,266 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:02,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1053,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:02,469 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:02,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:02,469 INFO L82 PathProgramCache]: Analyzing trace with hash 196489368, now seen corresponding path program 162 times [2021-06-12 19:55:02,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:02,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245494601] [2021-06-12 19:55:02,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:02,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:02,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245494601] [2021-06-12 19:55:02,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245494601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:02,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047803662] [2021-06-12 19:55:02,695 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 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 [2021-06-12 19:55:02,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:55:02,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:02,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:02,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:03,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047803662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:03,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:03,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:03,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303109645] [2021-06-12 19:55:03,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:03,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:03,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:03,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:03,092 INFO L87 Difference]: Start difference. First operand 143 states and 316 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) [2021-06-12 19:55:03,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:03,840 INFO L93 Difference]: Finished difference Result 203 states and 416 transitions. [2021-06-12 19:55:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:55:03,840 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 18 [2021-06-12 19:55:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:03,841 INFO L225 Difference]: With dead ends: 203 [2021-06-12 19:55:03,841 INFO L226 Difference]: Without dead ends: 174 [2021-06-12 19:55:03,841 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1014.8ms TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:55:03,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-12 19:55:03,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 144. [2021-06-12 19:55:03,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.2237762237762237) internal successors, (318), 143 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:03,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 318 transitions. [2021-06-12 19:55:03,842 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 318 transitions. Word has length 18 [2021-06-12 19:55:03,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:03,842 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 318 transitions. [2021-06-12 19:55:03,842 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) [2021-06-12 19:55:03,843 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 318 transitions. [2021-06-12 19:55:03,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:03,843 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:03,843 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:04,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:04,043 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:04,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:04,043 INFO L82 PathProgramCache]: Analyzing trace with hash 993225120, now seen corresponding path program 163 times [2021-06-12 19:55:04,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:04,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962385679] [2021-06-12 19:55:04,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:04,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:04,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962385679] [2021-06-12 19:55:04,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962385679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:04,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270594374] [2021-06-12 19:55:04,200 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 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 [2021-06-12 19:55:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:04,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:55:04,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:04,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:04,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270594374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:04,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:04,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:04,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305803905] [2021-06-12 19:55:04,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:04,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:04,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:04,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:04,511 INFO L87 Difference]: Start difference. First operand 144 states and 318 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) [2021-06-12 19:55:05,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:05,017 INFO L93 Difference]: Finished difference Result 212 states and 438 transitions. [2021-06-12 19:55:05,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:55:05,017 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 18 [2021-06-12 19:55:05,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:05,018 INFO L225 Difference]: With dead ends: 212 [2021-06-12 19:55:05,018 INFO L226 Difference]: Without dead ends: 193 [2021-06-12 19:55:05,018 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 633.9ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:55:05,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-12 19:55:05,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 144. [2021-06-12 19:55:05,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.2237762237762237) internal successors, (318), 143 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:05,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 318 transitions. [2021-06-12 19:55:05,019 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 318 transitions. Word has length 18 [2021-06-12 19:55:05,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:05,019 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 318 transitions. [2021-06-12 19:55:05,020 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) [2021-06-12 19:55:05,020 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 318 transitions. [2021-06-12 19:55:05,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:05,020 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:05,020 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:05,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1075 [2021-06-12 19:55:05,220 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:05,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:05,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1286645570, now seen corresponding path program 164 times [2021-06-12 19:55:05,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:05,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161690959] [2021-06-12 19:55:05,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:05,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:05,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:05,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161690959] [2021-06-12 19:55:05,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161690959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:05,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275041733] [2021-06-12 19:55:05,459 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 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 [2021-06-12 19:55:05,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:05,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:05,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:05,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:05,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275041733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:05,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:05,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:05,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325744022] [2021-06-12 19:55:05,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:05,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:05,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:05,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:05,831 INFO L87 Difference]: Start difference. First operand 144 states and 318 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) [2021-06-12 19:55:06,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:06,344 INFO L93 Difference]: Finished difference Result 190 states and 394 transitions. [2021-06-12 19:55:06,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:55:06,344 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 18 [2021-06-12 19:55:06,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:06,345 INFO L225 Difference]: With dead ends: 190 [2021-06-12 19:55:06,345 INFO L226 Difference]: Without dead ends: 172 [2021-06-12 19:55:06,345 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 808.0ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:55:06,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-12 19:55:06,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 146. [2021-06-12 19:55:06,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.220689655172414) internal successors, (322), 145 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:06,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 322 transitions. [2021-06-12 19:55:06,346 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 322 transitions. Word has length 18 [2021-06-12 19:55:06,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:06,346 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 322 transitions. [2021-06-12 19:55:06,346 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) [2021-06-12 19:55:06,347 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 322 transitions. [2021-06-12 19:55:06,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:06,347 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:06,347 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:06,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1085,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:06,547 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:06,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:06,547 INFO L82 PathProgramCache]: Analyzing trace with hash -489909818, now seen corresponding path program 165 times [2021-06-12 19:55:06,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:06,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017634459] [2021-06-12 19:55:06,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:06,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:06,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017634459] [2021-06-12 19:55:06,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017634459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:06,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58841125] [2021-06-12 19:55:06,726 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 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 [2021-06-12 19:55:06,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:55:06,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:06,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:06,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:07,075 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 19:55:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:07,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58841125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:07,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:07,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:07,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130488149] [2021-06-12 19:55:07,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:07,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:07,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:07,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:07,216 INFO L87 Difference]: Start difference. First operand 146 states and 322 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) [2021-06-12 19:55:07,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:07,954 INFO L93 Difference]: Finished difference Result 217 states and 437 transitions. [2021-06-12 19:55:07,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:55:07,954 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 18 [2021-06-12 19:55:07,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:07,955 INFO L225 Difference]: With dead ends: 217 [2021-06-12 19:55:07,955 INFO L226 Difference]: Without dead ends: 188 [2021-06-12 19:55:07,955 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1077.0ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:55:07,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-12 19:55:07,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 149. [2021-06-12 19:55:07,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.22972972972973) internal successors, (330), 148 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:07,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 330 transitions. [2021-06-12 19:55:07,956 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 330 transitions. Word has length 18 [2021-06-12 19:55:07,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:07,956 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 330 transitions. [2021-06-12 19:55:07,956 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) [2021-06-12 19:55:07,956 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 330 transitions. [2021-06-12 19:55:07,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:07,957 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:07,957 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:08,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1096,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:08,161 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:08,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:08,161 INFO L82 PathProgramCache]: Analyzing trace with hash 16436448, now seen corresponding path program 166 times [2021-06-12 19:55:08,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:08,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448103788] [2021-06-12 19:55:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:08,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:08,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448103788] [2021-06-12 19:55:08,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448103788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:08,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362881362] [2021-06-12 19:55:08,350 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 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 [2021-06-12 19:55:08,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:08,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:08,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:08,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:08,648 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 19:55:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:08,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362881362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:08,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:08,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:08,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785619751] [2021-06-12 19:55:08,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:08,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:08,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:08,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:08,844 INFO L87 Difference]: Start difference. First operand 149 states and 330 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) [2021-06-12 19:55:09,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:09,298 INFO L93 Difference]: Finished difference Result 219 states and 454 transitions. [2021-06-12 19:55:09,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:55:09,299 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 18 [2021-06-12 19:55:09,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:09,299 INFO L225 Difference]: With dead ends: 219 [2021-06-12 19:55:09,299 INFO L226 Difference]: Without dead ends: 200 [2021-06-12 19:55:09,299 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 774.6ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:55:09,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-12 19:55:09,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 150. [2021-06-12 19:55:09,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.2348993288590604) internal successors, (333), 149 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:09,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 333 transitions. [2021-06-12 19:55:09,301 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 333 transitions. Word has length 18 [2021-06-12 19:55:09,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:09,301 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 333 transitions. [2021-06-12 19:55:09,301 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) [2021-06-12 19:55:09,301 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 333 transitions. [2021-06-12 19:55:09,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:09,301 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:09,301 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:09,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1108 [2021-06-12 19:55:09,502 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:09,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:09,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1660498388, now seen corresponding path program 167 times [2021-06-12 19:55:09,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:09,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403934792] [2021-06-12 19:55:09,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:09,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:09,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403934792] [2021-06-12 19:55:09,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403934792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:09,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976986230] [2021-06-12 19:55:09,667 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 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 [2021-06-12 19:55:09,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:55:09,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:09,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:09,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:10,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976986230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:10,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:10,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:55:10,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809357655] [2021-06-12 19:55:10,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:55:10,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:10,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:55:10,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:55:10,057 INFO L87 Difference]: Start difference. First operand 150 states and 333 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) [2021-06-12 19:55:10,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:10,543 INFO L93 Difference]: Finished difference Result 170 states and 363 transitions. [2021-06-12 19:55:10,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:55:10,544 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 18 [2021-06-12 19:55:10,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:10,544 INFO L225 Difference]: With dead ends: 170 [2021-06-12 19:55:10,544 INFO L226 Difference]: Without dead ends: 155 [2021-06-12 19:55:10,544 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 794.4ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:55:10,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-12 19:55:10,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2021-06-12 19:55:10,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.2317880794701987) internal successors, (337), 151 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:10,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 337 transitions. [2021-06-12 19:55:10,546 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 337 transitions. Word has length 18 [2021-06-12 19:55:10,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:10,546 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 337 transitions. [2021-06-12 19:55:10,546 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) [2021-06-12 19:55:10,546 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 337 transitions. [2021-06-12 19:55:10,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:10,546 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:10,546 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:10,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1120,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:10,747 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:10,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:10,747 INFO L82 PathProgramCache]: Analyzing trace with hash 7545014, now seen corresponding path program 168 times [2021-06-12 19:55:10,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:10,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711216270] [2021-06-12 19:55:10,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:10,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:10,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711216270] [2021-06-12 19:55:10,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711216270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:10,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467700295] [2021-06-12 19:55:10,978 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 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 [2021-06-12 19:55:11,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:55:11,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:11,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:11,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:11,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467700295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:11,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:11,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:55:11,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143474947] [2021-06-12 19:55:11,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:55:11,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:11,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:55:11,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:55:11,415 INFO L87 Difference]: Start difference. First operand 152 states and 337 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) [2021-06-12 19:55:11,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:11,931 INFO L93 Difference]: Finished difference Result 169 states and 362 transitions. [2021-06-12 19:55:11,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:55:11,931 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 18 [2021-06-12 19:55:11,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:11,931 INFO L225 Difference]: With dead ends: 169 [2021-06-12 19:55:11,931 INFO L226 Difference]: Without dead ends: 156 [2021-06-12 19:55:11,932 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 873.0ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:55:11,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-12 19:55:11,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2021-06-12 19:55:11,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.2302631578947367) internal successors, (339), 152 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:11,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 339 transitions. [2021-06-12 19:55:11,933 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 339 transitions. Word has length 18 [2021-06-12 19:55:11,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:11,933 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 339 transitions. [2021-06-12 19:55:11,933 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) [2021-06-12 19:55:11,933 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 339 transitions. [2021-06-12 19:55:11,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:11,933 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:11,933 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:12,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1131,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:12,134 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:12,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:12,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1569796716, now seen corresponding path program 169 times [2021-06-12 19:55:12,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:12,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26137178] [2021-06-12 19:55:12,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:12,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:12,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26137178] [2021-06-12 19:55:12,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26137178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:12,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624127142] [2021-06-12 19:55:12,355 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 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 [2021-06-12 19:55:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:12,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:55:12,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:12,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624127142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:12,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:12,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:55:12,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726711804] [2021-06-12 19:55:12,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:55:12,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:12,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:55:12,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:55:12,781 INFO L87 Difference]: Start difference. First operand 153 states and 339 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) [2021-06-12 19:55:13,745 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-06-12 19:55:14,217 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-06-12 19:55:14,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:14,233 INFO L93 Difference]: Finished difference Result 226 states and 453 transitions. [2021-06-12 19:55:14,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:55:14,234 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 18 [2021-06-12 19:55:14,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:14,234 INFO L225 Difference]: With dead ends: 226 [2021-06-12 19:55:14,234 INFO L226 Difference]: Without dead ends: 201 [2021-06-12 19:55:14,234 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1735.6ms TimeCoverageRelationStatistics Valid=200, Invalid=1206, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:55:14,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-12 19:55:14,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 152. [2021-06-12 19:55:14,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.2317880794701987) internal successors, (337), 151 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:14,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 337 transitions. [2021-06-12 19:55:14,236 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 337 transitions. Word has length 18 [2021-06-12 19:55:14,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:14,236 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 337 transitions. [2021-06-12 19:55:14,236 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) [2021-06-12 19:55:14,236 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 337 transitions. [2021-06-12 19:55:14,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:14,236 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:14,236 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:14,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1142,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:14,437 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:14,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:14,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1475589924, now seen corresponding path program 170 times [2021-06-12 19:55:14,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:14,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649557114] [2021-06-12 19:55:14,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:14,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:14,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:14,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649557114] [2021-06-12 19:55:14,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649557114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:14,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385949571] [2021-06-12 19:55:14,665 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 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 [2021-06-12 19:55:14,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:14,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:14,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:14,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:15,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:15,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385949571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:15,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:15,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:15,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266790232] [2021-06-12 19:55:15,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:15,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:15,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:15,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:15,035 INFO L87 Difference]: Start difference. First operand 152 states and 337 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) [2021-06-12 19:55:15,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:15,359 INFO L93 Difference]: Finished difference Result 170 states and 364 transitions. [2021-06-12 19:55:15,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:55:15,360 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 18 [2021-06-12 19:55:15,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:15,360 INFO L225 Difference]: With dead ends: 170 [2021-06-12 19:55:15,360 INFO L226 Difference]: Without dead ends: 157 [2021-06-12 19:55:15,360 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 652.6ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:55:15,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-12 19:55:15,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2021-06-12 19:55:15,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2287581699346406) internal successors, (341), 153 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:15,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 341 transitions. [2021-06-12 19:55:15,362 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 341 transitions. Word has length 18 [2021-06-12 19:55:15,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:15,363 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 341 transitions. [2021-06-12 19:55:15,363 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) [2021-06-12 19:55:15,363 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 341 transitions. [2021-06-12 19:55:15,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:15,363 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:15,363 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:15,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1152,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:15,573 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:15,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:15,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1242035642, now seen corresponding path program 171 times [2021-06-12 19:55:15,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:15,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504857841] [2021-06-12 19:55:15,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:15,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:15,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504857841] [2021-06-12 19:55:15,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504857841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:15,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210754748] [2021-06-12 19:55:15,810 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 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 [2021-06-12 19:55:15,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:55:15,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:15,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:55:15,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:16,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:16,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210754748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:16,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:16,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:16,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920078880] [2021-06-12 19:55:16,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:16,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:16,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:16,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:16,194 INFO L87 Difference]: Start difference. First operand 154 states and 341 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) [2021-06-12 19:55:17,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:17,100 INFO L93 Difference]: Finished difference Result 202 states and 418 transitions. [2021-06-12 19:55:17,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:55:17,101 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 18 [2021-06-12 19:55:17,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:17,101 INFO L225 Difference]: With dead ends: 202 [2021-06-12 19:55:17,101 INFO L226 Difference]: Without dead ends: 181 [2021-06-12 19:55:17,101 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1135.4ms TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:55:17,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-12 19:55:17,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 155. [2021-06-12 19:55:17,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.2337662337662336) internal successors, (344), 154 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:17,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 344 transitions. [2021-06-12 19:55:17,103 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 344 transitions. Word has length 18 [2021-06-12 19:55:17,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:17,103 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 344 transitions. [2021-06-12 19:55:17,103 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) [2021-06-12 19:55:17,103 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 344 transitions. [2021-06-12 19:55:17,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:17,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:17,103 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:17,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1163,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:17,304 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:17,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:17,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1955577145, now seen corresponding path program 172 times [2021-06-12 19:55:17,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:17,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211009445] [2021-06-12 19:55:17,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:55:17,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:17,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211009445] [2021-06-12 19:55:17,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211009445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:17,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243632722] [2021-06-12 19:55:17,379 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 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 [2021-06-12 19:55:17,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:17,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:17,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:55:17,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:17,531 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:55:17,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243632722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:17,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:17,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:55:17,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676413906] [2021-06-12 19:55:17,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:55:17,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:17,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:55:17,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:55:17,531 INFO L87 Difference]: Start difference. First operand 155 states and 344 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) [2021-06-12 19:55:17,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:17,830 INFO L93 Difference]: Finished difference Result 186 states and 405 transitions. [2021-06-12 19:55:17,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:55:17,837 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 18 [2021-06-12 19:55:17,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:17,837 INFO L225 Difference]: With dead ends: 186 [2021-06-12 19:55:17,837 INFO L226 Difference]: Without dead ends: 186 [2021-06-12 19:55:17,837 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 342.0ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:55:17,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-12 19:55:17,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 155. [2021-06-12 19:55:17,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.2337662337662336) internal successors, (344), 154 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:17,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 344 transitions. [2021-06-12 19:55:17,839 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 344 transitions. Word has length 18 [2021-06-12 19:55:17,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:17,839 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 344 transitions. [2021-06-12 19:55:17,839 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) [2021-06-12 19:55:17,839 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 344 transitions. [2021-06-12 19:55:17,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:17,839 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:17,839 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:18,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1176 [2021-06-12 19:55:18,040 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:18,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:18,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1748381908, now seen corresponding path program 173 times [2021-06-12 19:55:18,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:18,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640817134] [2021-06-12 19:55:18,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:18,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:18,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640817134] [2021-06-12 19:55:18,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640817134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:18,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804085470] [2021-06-12 19:55:18,197 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 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 [2021-06-12 19:55:18,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:55:18,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:18,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:18,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:18,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804085470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:18,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:18,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:18,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194989738] [2021-06-12 19:55:18,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:18,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:18,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:18,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:18,560 INFO L87 Difference]: Start difference. First operand 155 states and 344 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) [2021-06-12 19:55:19,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:19,152 INFO L93 Difference]: Finished difference Result 212 states and 446 transitions. [2021-06-12 19:55:19,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:55:19,152 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 18 [2021-06-12 19:55:19,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:19,152 INFO L225 Difference]: With dead ends: 212 [2021-06-12 19:55:19,152 INFO L226 Difference]: Without dead ends: 192 [2021-06-12 19:55:19,152 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 799.1ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:55:19,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-12 19:55:19,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 157. [2021-06-12 19:55:19,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.230769230769231) internal successors, (348), 156 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:19,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 348 transitions. [2021-06-12 19:55:19,154 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 348 transitions. Word has length 18 [2021-06-12 19:55:19,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:19,154 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 348 transitions. [2021-06-12 19:55:19,154 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) [2021-06-12 19:55:19,154 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 348 transitions. [2021-06-12 19:55:19,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:19,154 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:19,154 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:19,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1181,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:19,355 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:19,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:19,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1211994058, now seen corresponding path program 174 times [2021-06-12 19:55:19,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:19,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403855863] [2021-06-12 19:55:19,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:19,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:19,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403855863] [2021-06-12 19:55:19,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403855863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:19,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275389164] [2021-06-12 19:55:19,511 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 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 [2021-06-12 19:55:19,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:55:19,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:19,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 19:55:19,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:19,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275389164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:19,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:19,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:19,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878719394] [2021-06-12 19:55:19,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:19,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:19,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:19,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:19,829 INFO L87 Difference]: Start difference. First operand 157 states and 348 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) [2021-06-12 19:55:20,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:20,518 INFO L93 Difference]: Finished difference Result 221 states and 456 transitions. [2021-06-12 19:55:20,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:55:20,518 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 18 [2021-06-12 19:55:20,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:20,519 INFO L225 Difference]: With dead ends: 221 [2021-06-12 19:55:20,519 INFO L226 Difference]: Without dead ends: 200 [2021-06-12 19:55:20,519 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 846.8ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:55:20,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-12 19:55:20,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 159. [2021-06-12 19:55:20,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.2341772151898733) internal successors, (353), 158 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:20,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 353 transitions. [2021-06-12 19:55:20,520 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 353 transitions. Word has length 18 [2021-06-12 19:55:20,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:20,520 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 353 transitions. [2021-06-12 19:55:20,520 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) [2021-06-12 19:55:20,521 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 353 transitions. [2021-06-12 19:55:20,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:20,521 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:20,521 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:20,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1192,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:20,721 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:20,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:20,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1749849636, now seen corresponding path program 175 times [2021-06-12 19:55:20,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:20,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925205248] [2021-06-12 19:55:20,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:20,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:20,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925205248] [2021-06-12 19:55:20,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925205248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:20,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508474854] [2021-06-12 19:55:20,879 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 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 [2021-06-12 19:55:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:20,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:20,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:21,150 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 19:55:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:21,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508474854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:21,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:21,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:21,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869050949] [2021-06-12 19:55:21,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:21,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:21,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:21,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:21,285 INFO L87 Difference]: Start difference. First operand 159 states and 353 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) [2021-06-12 19:55:21,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:21,754 INFO L93 Difference]: Finished difference Result 222 states and 464 transitions. [2021-06-12 19:55:21,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:55:21,755 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 18 [2021-06-12 19:55:21,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:21,755 INFO L225 Difference]: With dead ends: 222 [2021-06-12 19:55:21,755 INFO L226 Difference]: Without dead ends: 203 [2021-06-12 19:55:21,755 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 648.9ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:55:21,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-12 19:55:21,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 159. [2021-06-12 19:55:21,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.2341772151898733) internal successors, (353), 158 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:21,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 353 transitions. [2021-06-12 19:55:21,757 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 353 transitions. Word has length 18 [2021-06-12 19:55:21,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:21,757 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 353 transitions. [2021-06-12 19:55:21,757 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) [2021-06-12 19:55:21,757 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 353 transitions. [2021-06-12 19:55:21,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:21,757 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:21,757 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:21,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1204 [2021-06-12 19:55:21,958 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:21,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:21,958 INFO L82 PathProgramCache]: Analyzing trace with hash -208132746, now seen corresponding path program 176 times [2021-06-12 19:55:21,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:21,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856725991] [2021-06-12 19:55:21,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:22,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:22,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856725991] [2021-06-12 19:55:22,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856725991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:22,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048337677] [2021-06-12 19:55:22,180 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 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 [2021-06-12 19:55:22,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:22,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:22,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:22,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:22,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048337677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:22,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:22,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:22,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904743623] [2021-06-12 19:55:22,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:22,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:22,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:22,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:22,553 INFO L87 Difference]: Start difference. First operand 159 states and 353 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) [2021-06-12 19:55:22,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:22,845 INFO L93 Difference]: Finished difference Result 177 states and 380 transitions. [2021-06-12 19:55:22,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:55:22,845 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 18 [2021-06-12 19:55:22,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:22,846 INFO L225 Difference]: With dead ends: 177 [2021-06-12 19:55:22,846 INFO L226 Difference]: Without dead ends: 164 [2021-06-12 19:55:22,846 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 625.5ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:55:22,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-06-12 19:55:22,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2021-06-12 19:55:22,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.23125) internal successors, (357), 160 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:22,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 357 transitions. [2021-06-12 19:55:22,847 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 357 transitions. Word has length 18 [2021-06-12 19:55:22,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:22,847 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 357 transitions. [2021-06-12 19:55:22,847 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) [2021-06-12 19:55:22,847 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 357 transitions. [2021-06-12 19:55:22,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:22,848 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:22,848 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:23,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1216,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:23,048 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:23,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:23,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1785474476, now seen corresponding path program 177 times [2021-06-12 19:55:23,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:23,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577900574] [2021-06-12 19:55:23,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:23,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:23,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:23,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577900574] [2021-06-12 19:55:23,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577900574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:23,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942400853] [2021-06-12 19:55:23,303 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 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 [2021-06-12 19:55:23,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:55:23,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:23,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 19:55:23,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:23,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942400853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:23,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:23,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:23,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996188628] [2021-06-12 19:55:23,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:23,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:23,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:23,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:23,711 INFO L87 Difference]: Start difference. First operand 161 states and 357 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) [2021-06-12 19:55:24,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:24,429 INFO L93 Difference]: Finished difference Result 216 states and 440 transitions. [2021-06-12 19:55:24,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:55:24,430 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 18 [2021-06-12 19:55:24,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:24,430 INFO L225 Difference]: With dead ends: 216 [2021-06-12 19:55:24,430 INFO L226 Difference]: Without dead ends: 184 [2021-06-12 19:55:24,430 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1030.8ms TimeCoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:55:24,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-12 19:55:24,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 160. [2021-06-12 19:55:24,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.2327044025157234) internal successors, (355), 159 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:24,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 355 transitions. [2021-06-12 19:55:24,432 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 355 transitions. Word has length 18 [2021-06-12 19:55:24,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:24,432 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 355 transitions. [2021-06-12 19:55:24,432 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) [2021-06-12 19:55:24,432 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 355 transitions. [2021-06-12 19:55:24,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:24,432 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:24,432 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:24,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1227 [2021-06-12 19:55:24,633 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:24,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:24,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1279128210, now seen corresponding path program 178 times [2021-06-12 19:55:24,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:24,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282066825] [2021-06-12 19:55:24,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:24,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:24,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282066825] [2021-06-12 19:55:24,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282066825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:24,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600928273] [2021-06-12 19:55:24,855 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 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 [2021-06-12 19:55:24,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:24,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:24,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:24,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:25,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600928273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:25,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:25,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:25,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038425835] [2021-06-12 19:55:25,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:25,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:25,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:25,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:25,224 INFO L87 Difference]: Start difference. First operand 160 states and 355 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) [2021-06-12 19:55:26,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:26,166 INFO L93 Difference]: Finished difference Result 228 states and 475 transitions. [2021-06-12 19:55:26,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:55:26,166 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 18 [2021-06-12 19:55:26,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:26,166 INFO L225 Difference]: With dead ends: 228 [2021-06-12 19:55:26,166 INFO L226 Difference]: Without dead ends: 210 [2021-06-12 19:55:26,167 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1209.0ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:55:26,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-12 19:55:26,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 165. [2021-06-12 19:55:26,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.2439024390243905) internal successors, (368), 164 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:26,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 368 transitions. [2021-06-12 19:55:26,169 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 368 transitions. Word has length 18 [2021-06-12 19:55:26,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:26,169 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 368 transitions. [2021-06-12 19:55:26,169 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) [2021-06-12 19:55:26,169 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 368 transitions. [2021-06-12 19:55:26,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:26,170 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:26,170 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:26,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1238,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:26,385 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:26,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:26,385 INFO L82 PathProgramCache]: Analyzing trace with hash 55463120, now seen corresponding path program 179 times [2021-06-12 19:55:26,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:26,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235334827] [2021-06-12 19:55:26,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:26,529 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:26,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:26,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235334827] [2021-06-12 19:55:26,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235334827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:26,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647846256] [2021-06-12 19:55:26,530 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 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 [2021-06-12 19:55:26,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:55:26,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:26,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:26,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:26,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:26,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647846256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:26,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:26,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:26,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293705677] [2021-06-12 19:55:26,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:26,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:26,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:26,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:26,876 INFO L87 Difference]: Start difference. First operand 165 states and 368 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) [2021-06-12 19:55:27,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:27,604 INFO L93 Difference]: Finished difference Result 227 states and 468 transitions. [2021-06-12 19:55:27,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:55:27,604 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 18 [2021-06-12 19:55:27,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:27,605 INFO L225 Difference]: With dead ends: 227 [2021-06-12 19:55:27,605 INFO L226 Difference]: Without dead ends: 208 [2021-06-12 19:55:27,605 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 887.6ms TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:55:27,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-12 19:55:27,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 161. [2021-06-12 19:55:27,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.23125) internal successors, (357), 160 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 357 transitions. [2021-06-12 19:55:27,606 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 357 transitions. Word has length 18 [2021-06-12 19:55:27,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:27,607 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 357 transitions. [2021-06-12 19:55:27,607 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) [2021-06-12 19:55:27,607 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 357 transitions. [2021-06-12 19:55:27,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:27,607 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:27,607 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:27,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1249,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:27,821 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:27,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:27,821 INFO L82 PathProgramCache]: Analyzing trace with hash -482392458, now seen corresponding path program 180 times [2021-06-12 19:55:27,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:27,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116225401] [2021-06-12 19:55:27,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:27,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:27,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:27,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116225401] [2021-06-12 19:55:27,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116225401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:27,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979684903] [2021-06-12 19:55:27,990 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 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 [2021-06-12 19:55:28,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:55:28,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:28,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:28,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:28,271 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 19:55:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:28,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979684903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:28,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:28,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:28,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112871526] [2021-06-12 19:55:28,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:28,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:28,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:28,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:28,410 INFO L87 Difference]: Start difference. First operand 161 states and 357 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) [2021-06-12 19:55:28,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:28,857 INFO L93 Difference]: Finished difference Result 224 states and 468 transitions. [2021-06-12 19:55:28,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:55:28,857 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 18 [2021-06-12 19:55:28,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:28,858 INFO L225 Difference]: With dead ends: 224 [2021-06-12 19:55:28,858 INFO L226 Difference]: Without dead ends: 205 [2021-06-12 19:55:28,858 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 668.3ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:55:28,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-12 19:55:28,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 160. [2021-06-12 19:55:28,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.2327044025157234) internal successors, (355), 159 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:28,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 355 transitions. [2021-06-12 19:55:28,859 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 355 transitions. Word has length 18 [2021-06-12 19:55:28,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:28,860 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 355 transitions. [2021-06-12 19:55:28,860 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) [2021-06-12 19:55:28,860 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 355 transitions. [2021-06-12 19:55:28,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:28,860 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:28,860 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:29,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1262,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:29,060 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:29,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:29,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1532704148, now seen corresponding path program 181 times [2021-06-12 19:55:29,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:29,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475617956] [2021-06-12 19:55:29,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:29,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:29,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475617956] [2021-06-12 19:55:29,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475617956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:29,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934838222] [2021-06-12 19:55:29,273 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 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 [2021-06-12 19:55:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:29,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:29,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:29,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934838222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:29,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:29,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:29,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474431073] [2021-06-12 19:55:29,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:29,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:29,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:29,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:29,679 INFO L87 Difference]: Start difference. First operand 160 states and 355 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) [2021-06-12 19:55:30,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:30,512 INFO L93 Difference]: Finished difference Result 218 states and 444 transitions. [2021-06-12 19:55:30,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:55:30,513 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 18 [2021-06-12 19:55:30,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:30,513 INFO L225 Difference]: With dead ends: 218 [2021-06-12 19:55:30,513 INFO L226 Difference]: Without dead ends: 186 [2021-06-12 19:55:30,513 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1022.0ms TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:55:30,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-12 19:55:30,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 161. [2021-06-12 19:55:30,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.2375) internal successors, (358), 160 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:30,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 358 transitions. [2021-06-12 19:55:30,515 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 358 transitions. Word has length 18 [2021-06-12 19:55:30,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:30,515 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 358 transitions. [2021-06-12 19:55:30,515 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) [2021-06-12 19:55:30,515 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 358 transitions. [2021-06-12 19:55:30,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:30,515 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:30,515 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:30,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1274,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:30,716 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:30,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:30,716 INFO L82 PathProgramCache]: Analyzing trace with hash -2078756465, now seen corresponding path program 182 times [2021-06-12 19:55:30,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:30,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663914782] [2021-06-12 19:55:30,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:55:30,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:30,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663914782] [2021-06-12 19:55:30,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663914782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:30,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61722600] [2021-06-12 19:55:30,808 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 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 [2021-06-12 19:55:30,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:30,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:30,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:55:30,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:31,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:55:31,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61722600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:31,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:31,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:55:31,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128186884] [2021-06-12 19:55:31,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:55:31,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:31,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:55:31,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:55:31,052 INFO L87 Difference]: Start difference. First operand 161 states and 358 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) [2021-06-12 19:55:31,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:31,172 INFO L93 Difference]: Finished difference Result 170 states and 372 transitions. [2021-06-12 19:55:31,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:55:31,172 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 18 [2021-06-12 19:55:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:31,172 INFO L225 Difference]: With dead ends: 170 [2021-06-12 19:55:31,172 INFO L226 Difference]: Without dead ends: 170 [2021-06-12 19:55:31,173 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 253.2ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:55:31,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-06-12 19:55:31,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 159. [2021-06-12 19:55:31,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.221518987341772) internal successors, (351), 158 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:31,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 351 transitions. [2021-06-12 19:55:31,174 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 351 transitions. Word has length 18 [2021-06-12 19:55:31,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:31,174 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 351 transitions. [2021-06-12 19:55:31,174 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) [2021-06-12 19:55:31,174 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 351 transitions. [2021-06-12 19:55:31,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:31,174 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:31,174 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:31,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1285,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:31,375 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:31,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:31,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1965527396, now seen corresponding path program 183 times [2021-06-12 19:55:31,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:31,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146840296] [2021-06-12 19:55:31,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:31,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:31,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:31,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146840296] [2021-06-12 19:55:31,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146840296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:31,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688018282] [2021-06-12 19:55:31,524 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 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 [2021-06-12 19:55:31,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:55:31,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:31,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:31,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:31,808 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 19:55:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:31,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688018282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:31,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:31,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:31,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217661475] [2021-06-12 19:55:31,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:31,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:31,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:31,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:31,950 INFO L87 Difference]: Start difference. First operand 159 states and 351 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) [2021-06-12 19:55:32,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:32,429 INFO L93 Difference]: Finished difference Result 222 states and 462 transitions. [2021-06-12 19:55:32,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:55:32,430 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 18 [2021-06-12 19:55:32,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:32,430 INFO L225 Difference]: With dead ends: 222 [2021-06-12 19:55:32,430 INFO L226 Difference]: Without dead ends: 203 [2021-06-12 19:55:32,430 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 745.1ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:55:32,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-12 19:55:32,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 159. [2021-06-12 19:55:32,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.221518987341772) internal successors, (351), 158 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:32,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 351 transitions. [2021-06-12 19:55:32,432 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 351 transitions. Word has length 18 [2021-06-12 19:55:32,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:32,432 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 351 transitions. [2021-06-12 19:55:32,432 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) [2021-06-12 19:55:32,432 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 351 transitions. [2021-06-12 19:55:32,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:32,432 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:32,432 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:32,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1291,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:32,633 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:32,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:32,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1459181130, now seen corresponding path program 184 times [2021-06-12 19:55:32,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:32,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33402370] [2021-06-12 19:55:32,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:32,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:32,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33402370] [2021-06-12 19:55:32,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33402370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:32,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105529872] [2021-06-12 19:55:32,772 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 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 [2021-06-12 19:55:32,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:32,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:32,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:55:32,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:33,026 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 19:55:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:33,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105529872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:33,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:33,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:33,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78697288] [2021-06-12 19:55:33,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:33,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:33,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:33,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:33,203 INFO L87 Difference]: Start difference. First operand 159 states and 351 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) [2021-06-12 19:55:33,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:33,756 INFO L93 Difference]: Finished difference Result 226 states and 470 transitions. [2021-06-12 19:55:33,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:55:33,756 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 18 [2021-06-12 19:55:33,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:33,756 INFO L225 Difference]: With dead ends: 226 [2021-06-12 19:55:33,756 INFO L226 Difference]: Without dead ends: 207 [2021-06-12 19:55:33,757 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 750.5ms TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:55:33,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-12 19:55:33,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 159. [2021-06-12 19:55:33,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.221518987341772) internal successors, (351), 158 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:33,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 351 transitions. [2021-06-12 19:55:33,758 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 351 transitions. Word has length 18 [2021-06-12 19:55:33,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:33,758 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 351 transitions. [2021-06-12 19:55:33,758 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) [2021-06-12 19:55:33,758 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 351 transitions. [2021-06-12 19:55:33,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:33,759 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:33,759 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:33,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1303 [2021-06-12 19:55:33,961 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:33,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:33,961 INFO L82 PathProgramCache]: Analyzing trace with hash 428334108, now seen corresponding path program 185 times [2021-06-12 19:55:33,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:33,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95639817] [2021-06-12 19:55:33,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:34,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:34,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95639817] [2021-06-12 19:55:34,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95639817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:34,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051447066] [2021-06-12 19:55:34,136 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 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 [2021-06-12 19:55:34,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:55:34,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:34,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:55:34,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:34,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051447066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:34,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:34,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:34,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589455388] [2021-06-12 19:55:34,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:34,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:34,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:34,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:34,501 INFO L87 Difference]: Start difference. First operand 159 states and 351 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) [2021-06-12 19:55:35,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:35,322 INFO L93 Difference]: Finished difference Result 207 states and 433 transitions. [2021-06-12 19:55:35,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:55:35,322 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 18 [2021-06-12 19:55:35,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:35,323 INFO L225 Difference]: With dead ends: 207 [2021-06-12 19:55:35,323 INFO L226 Difference]: Without dead ends: 200 [2021-06-12 19:55:35,323 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1014.8ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:55:35,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-12 19:55:35,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 161. [2021-06-12 19:55:35,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.225) internal successors, (356), 160 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:35,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 356 transitions. [2021-06-12 19:55:35,325 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 356 transitions. Word has length 18 [2021-06-12 19:55:35,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:35,325 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 356 transitions. [2021-06-12 19:55:35,325 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) [2021-06-12 19:55:35,325 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 356 transitions. [2021-06-12 19:55:35,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:35,326 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:35,326 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:35,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1314,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:35,529 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:35,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:35,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1149007622, now seen corresponding path program 186 times [2021-06-12 19:55:35,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:35,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785554585] [2021-06-12 19:55:35,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:35,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:35,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785554585] [2021-06-12 19:55:35,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785554585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:35,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369654561] [2021-06-12 19:55:35,702 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 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 [2021-06-12 19:55:35,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:55:35,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:35,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:35,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:36,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369654561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:36,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:36,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:36,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418094815] [2021-06-12 19:55:36,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:36,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:36,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:36,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:36,101 INFO L87 Difference]: Start difference. First operand 161 states and 356 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) [2021-06-12 19:55:37,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:37,804 INFO L93 Difference]: Finished difference Result 266 states and 523 transitions. [2021-06-12 19:55:37,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:55:37,804 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 18 [2021-06-12 19:55:37,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:37,805 INFO L225 Difference]: With dead ends: 266 [2021-06-12 19:55:37,805 INFO L226 Difference]: Without dead ends: 228 [2021-06-12 19:55:37,805 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1807.2ms TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:55:37,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-12 19:55:37,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 164. [2021-06-12 19:55:37,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.2392638036809815) internal successors, (365), 163 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) [2021-06-12 19:55:37,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 365 transitions. [2021-06-12 19:55:37,807 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 365 transitions. Word has length 18 [2021-06-12 19:55:37,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:37,808 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 365 transitions. [2021-06-12 19:55:37,808 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) [2021-06-12 19:55:37,808 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 365 transitions. [2021-06-12 19:55:37,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:37,808 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:37,808 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:38,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1327,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:38,013 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:38,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:38,013 INFO L82 PathProgramCache]: Analyzing trace with hash -642661356, now seen corresponding path program 187 times [2021-06-12 19:55:38,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:38,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565635347] [2021-06-12 19:55:38,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:38,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:38,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565635347] [2021-06-12 19:55:38,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565635347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:38,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268845843] [2021-06-12 19:55:38,239 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 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 [2021-06-12 19:55:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:38,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:55:38,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:38,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268845843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:38,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:38,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:38,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709442338] [2021-06-12 19:55:38,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:38,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:38,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:38,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:38,584 INFO L87 Difference]: Start difference. First operand 164 states and 365 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) [2021-06-12 19:55:39,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:39,540 INFO L93 Difference]: Finished difference Result 228 states and 469 transitions. [2021-06-12 19:55:39,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:55:39,541 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 18 [2021-06-12 19:55:39,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:39,541 INFO L225 Difference]: With dead ends: 228 [2021-06-12 19:55:39,541 INFO L226 Difference]: Without dead ends: 203 [2021-06-12 19:55:39,541 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1100.5ms TimeCoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:55:39,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-12 19:55:39,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 165. [2021-06-12 19:55:39,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.2378048780487805) internal successors, (367), 164 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:39,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 367 transitions. [2021-06-12 19:55:39,543 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 367 transitions. Word has length 18 [2021-06-12 19:55:39,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:39,543 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 367 transitions. [2021-06-12 19:55:39,543 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) [2021-06-12 19:55:39,543 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 367 transitions. [2021-06-12 19:55:39,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:39,543 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:39,543 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:39,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1338 [2021-06-12 19:55:39,744 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:39,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:39,744 INFO L82 PathProgramCache]: Analyzing trace with hash 154074396, now seen corresponding path program 188 times [2021-06-12 19:55:39,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:39,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477119669] [2021-06-12 19:55:39,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:39,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:39,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477119669] [2021-06-12 19:55:39,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477119669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:39,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814279715] [2021-06-12 19:55:39,925 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 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 [2021-06-12 19:55:39,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:39,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:39,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:39,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:40,208 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 19:55:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:40,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814279715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:40,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:40,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:40,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443403424] [2021-06-12 19:55:40,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:40,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:40,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:40,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:40,348 INFO L87 Difference]: Start difference. First operand 165 states and 367 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) [2021-06-12 19:55:40,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:40,849 INFO L93 Difference]: Finished difference Result 233 states and 476 transitions. [2021-06-12 19:55:40,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:55:40,850 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 18 [2021-06-12 19:55:40,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:40,850 INFO L225 Difference]: With dead ends: 233 [2021-06-12 19:55:40,850 INFO L226 Difference]: Without dead ends: 211 [2021-06-12 19:55:40,850 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 731.6ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:55:40,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-12 19:55:40,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 166. [2021-06-12 19:55:40,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.2363636363636363) internal successors, (369), 165 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:40,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 369 transitions. [2021-06-12 19:55:40,852 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 369 transitions. Word has length 18 [2021-06-12 19:55:40,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:40,852 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 369 transitions. [2021-06-12 19:55:40,852 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) [2021-06-12 19:55:40,852 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 369 transitions. [2021-06-12 19:55:40,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:40,853 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:40,853 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:41,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1351,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:41,069 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:41,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:41,069 INFO L82 PathProgramCache]: Analyzing trace with hash -2125796294, now seen corresponding path program 189 times [2021-06-12 19:55:41,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:41,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093102600] [2021-06-12 19:55:41,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:41,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:41,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:41,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093102600] [2021-06-12 19:55:41,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093102600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:41,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978345360] [2021-06-12 19:55:41,275 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 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 [2021-06-12 19:55:41,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:55:41,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:41,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 19:55:41,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:41,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:41,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978345360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:41,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:41,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:41,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618357928] [2021-06-12 19:55:41,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:41,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:41,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:41,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:41,648 INFO L87 Difference]: Start difference. First operand 166 states and 369 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) [2021-06-12 19:55:42,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:42,369 INFO L93 Difference]: Finished difference Result 223 states and 456 transitions. [2021-06-12 19:55:42,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:55:42,369 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 18 [2021-06-12 19:55:42,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:42,370 INFO L225 Difference]: With dead ends: 223 [2021-06-12 19:55:42,370 INFO L226 Difference]: Without dead ends: 191 [2021-06-12 19:55:42,370 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 933.4ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:55:42,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-12 19:55:42,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 168. [2021-06-12 19:55:42,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2335329341317367) internal successors, (373), 167 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:42,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 373 transitions. [2021-06-12 19:55:42,371 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 373 transitions. Word has length 18 [2021-06-12 19:55:42,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:42,371 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 373 transitions. [2021-06-12 19:55:42,371 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) [2021-06-12 19:55:42,371 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 373 transitions. [2021-06-12 19:55:42,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:42,372 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:42,372 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:42,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1363 [2021-06-12 19:55:42,572 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:42,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:42,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1329060542, now seen corresponding path program 190 times [2021-06-12 19:55:42,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:42,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113565118] [2021-06-12 19:55:42,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:42,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:42,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:42,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113565118] [2021-06-12 19:55:42,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113565118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:42,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195088193] [2021-06-12 19:55:42,734 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 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 [2021-06-12 19:55:42,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:42,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:42,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:42,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:43,010 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 19:55:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:43,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195088193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:43,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:43,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:43,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238924153] [2021-06-12 19:55:43,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:43,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:43,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:43,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:43,146 INFO L87 Difference]: Start difference. First operand 168 states and 373 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) [2021-06-12 19:55:43,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:43,797 INFO L93 Difference]: Finished difference Result 235 states and 480 transitions. [2021-06-12 19:55:43,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:55:43,797 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 18 [2021-06-12 19:55:43,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:43,798 INFO L225 Difference]: With dead ends: 235 [2021-06-12 19:55:43,798 INFO L226 Difference]: Without dead ends: 213 [2021-06-12 19:55:43,798 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 853.0ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:55:43,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-12 19:55:43,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 167. [2021-06-12 19:55:43,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.2349397590361444) internal successors, (371), 166 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:43,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 371 transitions. [2021-06-12 19:55:43,800 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 371 transitions. Word has length 18 [2021-06-12 19:55:43,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:43,800 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 371 transitions. [2021-06-12 19:55:43,800 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) [2021-06-12 19:55:43,800 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 371 transitions. [2021-06-12 19:55:43,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:43,800 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:43,800 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:44,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1374 [2021-06-12 19:55:44,000 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:44,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:44,001 INFO L82 PathProgramCache]: Analyzing trace with hash -822714276, now seen corresponding path program 191 times [2021-06-12 19:55:44,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:44,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708371242] [2021-06-12 19:55:44,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:44,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:44,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:44,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708371242] [2021-06-12 19:55:44,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708371242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:44,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699167533] [2021-06-12 19:55:44,153 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 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 [2021-06-12 19:55:44,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:55:44,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:44,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:44,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:44,408 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 19:55:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:44,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699167533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:44,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:44,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:44,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787880751] [2021-06-12 19:55:44,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:44,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:44,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:44,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:44,610 INFO L87 Difference]: Start difference. First operand 167 states and 371 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) [2021-06-12 19:55:45,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:45,298 INFO L93 Difference]: Finished difference Result 239 states and 488 transitions. [2021-06-12 19:55:45,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:55:45,298 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 18 [2021-06-12 19:55:45,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:45,299 INFO L225 Difference]: With dead ends: 239 [2021-06-12 19:55:45,299 INFO L226 Difference]: Without dead ends: 214 [2021-06-12 19:55:45,300 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 928.9ms TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:55:45,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-12 19:55:45,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 168. [2021-06-12 19:55:45,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2335329341317367) internal successors, (373), 167 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:45,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 373 transitions. [2021-06-12 19:55:45,302 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 373 transitions. Word has length 18 [2021-06-12 19:55:45,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:45,302 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 373 transitions. [2021-06-12 19:55:45,302 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) [2021-06-12 19:55:45,302 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 373 transitions. [2021-06-12 19:55:45,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:45,303 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:45,303 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:45,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1386 [2021-06-12 19:55:45,517 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:45,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:45,517 INFO L82 PathProgramCache]: Analyzing trace with hash -858339116, now seen corresponding path program 192 times [2021-06-12 19:55:45,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:45,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137652413] [2021-06-12 19:55:45,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:45,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:45,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:45,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137652413] [2021-06-12 19:55:45,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137652413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:45,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121660786] [2021-06-12 19:55:45,753 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 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 [2021-06-12 19:55:45,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:55:45,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:45,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:55:45,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:46,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121660786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:46,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:46,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:46,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067784802] [2021-06-12 19:55:46,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:46,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:46,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:46,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:46,109 INFO L87 Difference]: Start difference. First operand 168 states and 373 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) [2021-06-12 19:55:46,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:46,939 INFO L93 Difference]: Finished difference Result 222 states and 462 transitions. [2021-06-12 19:55:46,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:55:46,939 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 18 [2021-06-12 19:55:46,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:46,940 INFO L225 Difference]: With dead ends: 222 [2021-06-12 19:55:46,940 INFO L226 Difference]: Without dead ends: 197 [2021-06-12 19:55:46,940 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1052.0ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:55:46,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-12 19:55:46,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 171. [2021-06-12 19:55:46,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.2294117647058824) internal successors, (379), 170 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:46,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 379 transitions. [2021-06-12 19:55:46,942 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 379 transitions. Word has length 18 [2021-06-12 19:55:46,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:46,942 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 379 transitions. [2021-06-12 19:55:46,942 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) [2021-06-12 19:55:46,942 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 379 transitions. [2021-06-12 19:55:46,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:46,942 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:46,942 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:47,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1398 [2021-06-12 19:55:47,143 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:47,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:47,143 INFO L82 PathProgramCache]: Analyzing trace with hash -61603364, now seen corresponding path program 193 times [2021-06-12 19:55:47,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:47,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382104419] [2021-06-12 19:55:47,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:47,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:47,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:47,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382104419] [2021-06-12 19:55:47,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382104419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:47,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138774240] [2021-06-12 19:55:47,324 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 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 [2021-06-12 19:55:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:47,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:47,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:47,606 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 19:55:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:47,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138774240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:47,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:47,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:47,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694505151] [2021-06-12 19:55:47,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:47,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:47,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:47,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:47,749 INFO L87 Difference]: Start difference. First operand 171 states and 379 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) [2021-06-12 19:55:48,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:48,326 INFO L93 Difference]: Finished difference Result 238 states and 486 transitions. [2021-06-12 19:55:48,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:55:48,327 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 18 [2021-06-12 19:55:48,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:48,327 INFO L225 Difference]: With dead ends: 238 [2021-06-12 19:55:48,327 INFO L226 Difference]: Without dead ends: 216 [2021-06-12 19:55:48,327 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 777.0ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:55:48,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-12 19:55:48,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 170. [2021-06-12 19:55:48,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.230769230769231) internal successors, (377), 169 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:48,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 377 transitions. [2021-06-12 19:55:48,329 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 377 transitions. Word has length 18 [2021-06-12 19:55:48,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:48,329 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 377 transitions. [2021-06-12 19:55:48,329 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) [2021-06-12 19:55:48,329 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 377 transitions. [2021-06-12 19:55:48,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:48,329 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:48,330 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:48,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1411 [2021-06-12 19:55:48,530 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:48,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:48,530 INFO L82 PathProgramCache]: Analyzing trace with hash 444742902, now seen corresponding path program 194 times [2021-06-12 19:55:48,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:48,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060081890] [2021-06-12 19:55:48,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:48,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:48,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060081890] [2021-06-12 19:55:48,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060081890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:48,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9688621] [2021-06-12 19:55:48,683 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 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 [2021-06-12 19:55:48,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:48,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:48,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:48,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:48,936 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 19:55:49,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:49,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9688621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:49,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:49,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:49,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193182527] [2021-06-12 19:55:49,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:49,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:49,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:49,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:49,127 INFO L87 Difference]: Start difference. First operand 170 states and 377 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) [2021-06-12 19:55:49,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:49,712 INFO L93 Difference]: Finished difference Result 240 states and 490 transitions. [2021-06-12 19:55:49,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:55:49,713 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 18 [2021-06-12 19:55:49,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:49,713 INFO L225 Difference]: With dead ends: 240 [2021-06-12 19:55:49,713 INFO L226 Difference]: Without dead ends: 215 [2021-06-12 19:55:49,713 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 839.4ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:55:49,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-12 19:55:49,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 169. [2021-06-12 19:55:49,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.232142857142857) internal successors, (375), 168 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:49,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 375 transitions. [2021-06-12 19:55:49,715 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 375 transitions. Word has length 18 [2021-06-12 19:55:49,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:49,715 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 375 transitions. [2021-06-12 19:55:49,715 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) [2021-06-12 19:55:49,715 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 375 transitions. [2021-06-12 19:55:49,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:49,715 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:49,715 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:49,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1423 [2021-06-12 19:55:49,916 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:49,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:49,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1038392036, now seen corresponding path program 195 times [2021-06-12 19:55:49,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:49,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283213782] [2021-06-12 19:55:49,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:50,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:50,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:50,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283213782] [2021-06-12 19:55:50,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283213782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:50,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599477952] [2021-06-12 19:55:50,072 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 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 [2021-06-12 19:55:50,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:55:50,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:50,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 19:55:50,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:50,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599477952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:50,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:50,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:55:50,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988714519] [2021-06-12 19:55:50,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:55:50,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:50,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:55:50,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:55:50,485 INFO L87 Difference]: Start difference. First operand 169 states and 375 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) [2021-06-12 19:55:50,970 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-12 19:55:51,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:51,593 INFO L93 Difference]: Finished difference Result 255 states and 513 transitions. [2021-06-12 19:55:51,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:55:51,594 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 18 [2021-06-12 19:55:51,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:51,594 INFO L225 Difference]: With dead ends: 255 [2021-06-12 19:55:51,594 INFO L226 Difference]: Without dead ends: 217 [2021-06-12 19:55:51,594 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1302.1ms TimeCoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:55:51,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-12 19:55:51,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 170. [2021-06-12 19:55:51,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.230769230769231) internal successors, (377), 169 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:51,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 377 transitions. [2021-06-12 19:55:51,596 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 377 transitions. Word has length 18 [2021-06-12 19:55:51,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:51,596 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 377 transitions. [2021-06-12 19:55:51,596 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) [2021-06-12 19:55:51,596 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 377 transitions. [2021-06-12 19:55:51,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:51,596 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:51,596 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:51,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1435,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:51,797 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:51,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:51,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1142907740, now seen corresponding path program 196 times [2021-06-12 19:55:51,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:51,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356152402] [2021-06-12 19:55:51,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:51,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:51,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356152402] [2021-06-12 19:55:51,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356152402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:51,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409816334] [2021-06-12 19:55:51,941 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 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 [2021-06-12 19:55:51,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:51,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:51,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:55:51,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:52,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409816334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:52,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:52,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:55:52,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772138633] [2021-06-12 19:55:52,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:55:52,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:52,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:55:52,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:55:52,286 INFO L87 Difference]: Start difference. First operand 170 states and 377 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) [2021-06-12 19:55:52,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:52,610 INFO L93 Difference]: Finished difference Result 188 states and 403 transitions. [2021-06-12 19:55:52,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:55:52,610 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 18 [2021-06-12 19:55:52,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:52,610 INFO L225 Difference]: With dead ends: 188 [2021-06-12 19:55:52,610 INFO L226 Difference]: Without dead ends: 173 [2021-06-12 19:55:52,611 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 610.6ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:55:52,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-12 19:55:52,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2021-06-12 19:55:52,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.2294117647058824) internal successors, (379), 170 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:52,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 379 transitions. [2021-06-12 19:55:52,612 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 379 transitions. Word has length 18 [2021-06-12 19:55:52,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:52,612 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 379 transitions. [2021-06-12 19:55:52,612 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) [2021-06-12 19:55:52,613 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 379 transitions. [2021-06-12 19:55:52,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:52,613 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:52,613 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:52,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1446 [2021-06-12 19:55:52,813 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:52,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:52,813 INFO L82 PathProgramCache]: Analyzing trace with hash -510045634, now seen corresponding path program 197 times [2021-06-12 19:55:52,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:52,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55632473] [2021-06-12 19:55:52,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:53,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:53,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55632473] [2021-06-12 19:55:53,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55632473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:53,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170176413] [2021-06-12 19:55:53,009 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 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 [2021-06-12 19:55:53,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:55:53,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:53,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:53,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:53,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:53,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170176413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:53,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:53,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:55:53,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342315641] [2021-06-12 19:55:53,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:55:53,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:53,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:55:53,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:55:53,407 INFO L87 Difference]: Start difference. First operand 171 states and 379 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) [2021-06-12 19:55:53,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:53,777 INFO L93 Difference]: Finished difference Result 187 states and 402 transitions. [2021-06-12 19:55:53,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:55:53,777 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 18 [2021-06-12 19:55:53,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:53,777 INFO L225 Difference]: With dead ends: 187 [2021-06-12 19:55:53,777 INFO L226 Difference]: Without dead ends: 174 [2021-06-12 19:55:53,777 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 710.2ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:55:53,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-12 19:55:53,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2021-06-12 19:55:53,779 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) [2021-06-12 19:55:53,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 381 transitions. [2021-06-12 19:55:53,779 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 381 transitions. Word has length 18 [2021-06-12 19:55:53,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:53,779 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 381 transitions. [2021-06-12 19:55:53,779 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) [2021-06-12 19:55:53,779 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 381 transitions. [2021-06-12 19:55:53,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:53,779 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:53,779 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:53,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1456 [2021-06-12 19:55:53,980 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:53,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:53,980 INFO L82 PathProgramCache]: Analyzing trace with hash -2087387364, now seen corresponding path program 198 times [2021-06-12 19:55:53,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:53,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487504058] [2021-06-12 19:55:53,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:53,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:54,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:54,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:54,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487504058] [2021-06-12 19:55:54,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487504058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:54,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126967053] [2021-06-12 19:55:54,178 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 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 [2021-06-12 19:55:54,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:55:54,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:54,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:54,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:54,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126967053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:54,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:54,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:55:54,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731779952] [2021-06-12 19:55:54,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:55:54,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:54,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:55:54,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:55:54,611 INFO L87 Difference]: Start difference. First operand 172 states and 381 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) [2021-06-12 19:55:55,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:55,551 INFO L93 Difference]: Finished difference Result 228 states and 467 transitions. [2021-06-12 19:55:55,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:55:55,551 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 18 [2021-06-12 19:55:55,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:55,552 INFO L225 Difference]: With dead ends: 228 [2021-06-12 19:55:55,552 INFO L226 Difference]: Without dead ends: 196 [2021-06-12 19:55:55,552 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1202.9ms TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:55:55,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-12 19:55:55,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 170. [2021-06-12 19:55:55,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.230769230769231) internal successors, (377), 169 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:55,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 377 transitions. [2021-06-12 19:55:55,553 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 377 transitions. Word has length 18 [2021-06-12 19:55:55,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:55,553 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 377 transitions. [2021-06-12 19:55:55,553 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) [2021-06-12 19:55:55,554 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 377 transitions. [2021-06-12 19:55:55,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:55,554 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:55,554 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:55,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1467,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:55,754 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:55,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:55,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1993180572, now seen corresponding path program 199 times [2021-06-12 19:55:55,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:55,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303879384] [2021-06-12 19:55:55,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:55,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:55,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:55,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303879384] [2021-06-12 19:55:55,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303879384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:55,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911262250] [2021-06-12 19:55:55,969 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 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 [2021-06-12 19:55:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:56,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:55:56,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:56,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911262250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:56,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:56,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:56,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843804844] [2021-06-12 19:55:56,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:56,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:56,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:56,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:56,400 INFO L87 Difference]: Start difference. First operand 170 states and 377 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) [2021-06-12 19:55:56,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:56,722 INFO L93 Difference]: Finished difference Result 187 states and 404 transitions. [2021-06-12 19:55:56,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:55:56,722 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 18 [2021-06-12 19:55:56,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:56,723 INFO L225 Difference]: With dead ends: 187 [2021-06-12 19:55:56,723 INFO L226 Difference]: Without dead ends: 180 [2021-06-12 19:55:56,723 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 687.6ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:55:56,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-12 19:55:56,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 172. [2021-06-12 19:55:56,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.2339181286549707) internal successors, (382), 171 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:56,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 382 transitions. [2021-06-12 19:55:56,724 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 382 transitions. Word has length 18 [2021-06-12 19:55:56,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:56,724 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 382 transitions. [2021-06-12 19:55:56,724 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) [2021-06-12 19:55:56,725 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 382 transitions. [2021-06-12 19:55:56,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:56,725 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:56,725 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:56,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1478 [2021-06-12 19:55:56,925 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:56,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:56,925 INFO L82 PathProgramCache]: Analyzing trace with hash 724444994, now seen corresponding path program 200 times [2021-06-12 19:55:56,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:56,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114139940] [2021-06-12 19:55:56,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:57,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:57,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:57,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114139940] [2021-06-12 19:55:57,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114139940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:57,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424741969] [2021-06-12 19:55:57,117 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 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 [2021-06-12 19:55:57,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:57,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:57,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:57,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:57,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424741969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:57,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:57,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:57,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023273143] [2021-06-12 19:55:57,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:57,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:57,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:57,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:57,505 INFO L87 Difference]: Start difference. First operand 172 states and 382 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) [2021-06-12 19:55:58,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:58,024 INFO L93 Difference]: Finished difference Result 218 states and 454 transitions. [2021-06-12 19:55:58,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:55:58,025 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 18 [2021-06-12 19:55:58,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:58,025 INFO L225 Difference]: With dead ends: 218 [2021-06-12 19:55:58,025 INFO L226 Difference]: Without dead ends: 207 [2021-06-12 19:55:58,025 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 789.4ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:55:58,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-12 19:55:58,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 173. [2021-06-12 19:55:58,026 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) [2021-06-12 19:55:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 384 transitions. [2021-06-12 19:55:58,027 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 384 transitions. Word has length 18 [2021-06-12 19:55:58,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:58,027 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 384 transitions. [2021-06-12 19:55:58,027 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) [2021-06-12 19:55:58,027 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 384 transitions. [2021-06-12 19:55:58,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:58,027 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:58,027 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:58,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1491,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:58,228 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:58,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:58,228 INFO L82 PathProgramCache]: Analyzing trace with hash 2059036324, now seen corresponding path program 201 times [2021-06-12 19:55:58,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:58,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601921783] [2021-06-12 19:55:58,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:58,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:58,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:58,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601921783] [2021-06-12 19:55:58,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601921783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:58,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465184025] [2021-06-12 19:55:58,377 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 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 [2021-06-12 19:55:58,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:55:58,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:58,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:55:58,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:58,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:58,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465184025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:58,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:58,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:55:58,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158621618] [2021-06-12 19:55:58,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:55:58,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:58,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:55:58,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:58,784 INFO L87 Difference]: Start difference. First operand 173 states and 384 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) [2021-06-12 19:55:59,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:59,819 INFO L93 Difference]: Finished difference Result 250 states and 508 transitions. [2021-06-12 19:55:59,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:55:59,819 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 18 [2021-06-12 19:55:59,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:59,819 INFO L225 Difference]: With dead ends: 250 [2021-06-12 19:55:59,819 INFO L226 Difference]: Without dead ends: 224 [2021-06-12 19:55:59,820 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1218.7ms TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:55:59,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-12 19:55:59,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 174. [2021-06-12 19:55:59,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.23121387283237) internal successors, (386), 173 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) [2021-06-12 19:55:59,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 386 transitions. [2021-06-12 19:55:59,821 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 386 transitions. Word has length 18 [2021-06-12 19:55:59,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:59,821 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 386 transitions. [2021-06-12 19:55:59,821 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) [2021-06-12 19:55:59,821 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 386 transitions. [2021-06-12 19:55:59,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:55:59,822 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:59,822 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:00,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1502 [2021-06-12 19:56:00,022 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:00,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:00,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1437986497, now seen corresponding path program 202 times [2021-06-12 19:56:00,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:00,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786528880] [2021-06-12 19:56:00,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:00,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:00,096 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:56:00,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:00,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786528880] [2021-06-12 19:56:00,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786528880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:00,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799919104] [2021-06-12 19:56:00,096 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 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 [2021-06-12 19:56:00,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:00,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:00,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:56:00,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:00,253 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:56:00,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799919104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:00,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:00,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:56:00,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696953427] [2021-06-12 19:56:00,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:56:00,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:00,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:56:00,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:56:00,253 INFO L87 Difference]: Start difference. First operand 174 states and 386 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) [2021-06-12 19:56:00,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:00,563 INFO L93 Difference]: Finished difference Result 207 states and 450 transitions. [2021-06-12 19:56:00,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:56:00,564 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 18 [2021-06-12 19:56:00,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:00,564 INFO L225 Difference]: With dead ends: 207 [2021-06-12 19:56:00,564 INFO L226 Difference]: Without dead ends: 207 [2021-06-12 19:56:00,564 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 343.9ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:56:00,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-12 19:56:00,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 174. [2021-06-12 19:56:00,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.23121387283237) internal successors, (386), 173 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) [2021-06-12 19:56:00,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 386 transitions. [2021-06-12 19:56:00,566 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 386 transitions. Word has length 18 [2021-06-12 19:56:00,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:00,566 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 386 transitions. [2021-06-12 19:56:00,566 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) [2021-06-12 19:56:00,566 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 386 transitions. [2021-06-12 19:56:00,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:00,566 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:00,566 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:00,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1515,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:00,767 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:00,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:00,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1230791260, now seen corresponding path program 203 times [2021-06-12 19:56:00,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:00,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138225344] [2021-06-12 19:56:00,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:01,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:01,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138225344] [2021-06-12 19:56:01,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138225344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:01,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517025184] [2021-06-12 19:56:01,015 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 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 [2021-06-12 19:56:01,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:56:01,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:01,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 19:56:01,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:01,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517025184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:01,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:01,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:01,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355860315] [2021-06-12 19:56:01,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:01,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:01,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:01,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:01,456 INFO L87 Difference]: Start difference. First operand 174 states and 386 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) [2021-06-12 19:56:01,719 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-06-12 19:56:02,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:02,120 INFO L93 Difference]: Finished difference Result 227 states and 468 transitions. [2021-06-12 19:56:02,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:56:02,120 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 18 [2021-06-12 19:56:02,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:02,121 INFO L225 Difference]: With dead ends: 227 [2021-06-12 19:56:02,121 INFO L226 Difference]: Without dead ends: 216 [2021-06-12 19:56:02,121 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1032.4ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:56:02,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-12 19:56:02,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 176. [2021-06-12 19:56:02,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2285714285714286) internal successors, (390), 175 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) [2021-06-12 19:56:02,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 390 transitions. [2021-06-12 19:56:02,123 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 390 transitions. Word has length 18 [2021-06-12 19:56:02,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:02,123 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 390 transitions. [2021-06-12 19:56:02,123 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) [2021-06-12 19:56:02,123 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 390 transitions. [2021-06-12 19:56:02,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:02,123 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:02,123 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:02,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1520 [2021-06-12 19:56:02,324 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:02,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:02,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1729584706, now seen corresponding path program 204 times [2021-06-12 19:56:02,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:02,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936574983] [2021-06-12 19:56:02,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:02,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:02,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936574983] [2021-06-12 19:56:02,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936574983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:02,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080294994] [2021-06-12 19:56:02,468 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 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 [2021-06-12 19:56:02,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:56:02,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:02,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 19:56:02,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:02,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080294994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:02,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:02,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:02,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416380295] [2021-06-12 19:56:02,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:02,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:02,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:02,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:02,784 INFO L87 Difference]: Start difference. First operand 176 states and 390 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) [2021-06-12 19:56:03,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:03,690 INFO L93 Difference]: Finished difference Result 273 states and 546 transitions. [2021-06-12 19:56:03,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:56:03,690 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 18 [2021-06-12 19:56:03,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:03,690 INFO L225 Difference]: With dead ends: 273 [2021-06-12 19:56:03,690 INFO L226 Difference]: Without dead ends: 254 [2021-06-12 19:56:03,690 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 998.4ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:56:03,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-12 19:56:03,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 178. [2021-06-12 19:56:03,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.23728813559322) internal successors, (396), 177 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:03,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-06-12 19:56:03,692 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 18 [2021-06-12 19:56:03,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:03,692 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-06-12 19:56:03,692 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) [2021-06-12 19:56:03,692 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-06-12 19:56:03,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:03,693 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:03,693 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:03,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1530,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:03,893 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:03,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:03,893 INFO L82 PathProgramCache]: Analyzing trace with hash 2027527012, now seen corresponding path program 205 times [2021-06-12 19:56:03,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:03,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13585130] [2021-06-12 19:56:03,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:04,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:04,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13585130] [2021-06-12 19:56:04,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13585130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:04,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908594801] [2021-06-12 19:56:04,041 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 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 [2021-06-12 19:56:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:04,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:56:04,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:04,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908594801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:04,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:04,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:04,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550943235] [2021-06-12 19:56:04,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:04,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:04,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:04,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:04,321 INFO L87 Difference]: Start difference. First operand 178 states and 396 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) [2021-06-12 19:56:05,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:05,190 INFO L93 Difference]: Finished difference Result 262 states and 533 transitions. [2021-06-12 19:56:05,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:56:05,190 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 18 [2021-06-12 19:56:05,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:05,190 INFO L225 Difference]: With dead ends: 262 [2021-06-12 19:56:05,191 INFO L226 Difference]: Without dead ends: 236 [2021-06-12 19:56:05,191 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 941.4ms TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:56:05,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-12 19:56:05,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 174. [2021-06-12 19:56:05,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.213872832369942) internal successors, (383), 173 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) [2021-06-12 19:56:05,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 383 transitions. [2021-06-12 19:56:05,192 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 383 transitions. Word has length 18 [2021-06-12 19:56:05,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:05,192 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 383 transitions. [2021-06-12 19:56:05,192 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) [2021-06-12 19:56:05,193 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 383 transitions. [2021-06-12 19:56:05,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:05,193 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:05,193 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:05,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1542 [2021-06-12 19:56:05,393 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:05,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:05,393 INFO L82 PathProgramCache]: Analyzing trace with hash -725723394, now seen corresponding path program 206 times [2021-06-12 19:56:05,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:05,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27008763] [2021-06-12 19:56:05,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:05,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:05,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27008763] [2021-06-12 19:56:05,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27008763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:05,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260541828] [2021-06-12 19:56:05,550 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 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 [2021-06-12 19:56:05,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:05,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:05,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:56:05,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:05,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:05,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260541828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:05,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:05,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:05,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255347596] [2021-06-12 19:56:05,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:05,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:05,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:05,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:05,918 INFO L87 Difference]: Start difference. First operand 174 states and 383 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) [2021-06-12 19:56:06,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:06,357 INFO L93 Difference]: Finished difference Result 210 states and 446 transitions. [2021-06-12 19:56:06,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:56:06,357 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 18 [2021-06-12 19:56:06,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:06,357 INFO L225 Difference]: With dead ends: 210 [2021-06-12 19:56:06,357 INFO L226 Difference]: Without dead ends: 197 [2021-06-12 19:56:06,357 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 677.1ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:56:06,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-12 19:56:06,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 176. [2021-06-12 19:56:06,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2114285714285713) internal successors, (387), 175 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) [2021-06-12 19:56:06,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 387 transitions. [2021-06-12 19:56:06,359 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 387 transitions. Word has length 18 [2021-06-12 19:56:06,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:06,359 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 387 transitions. [2021-06-12 19:56:06,359 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) [2021-06-12 19:56:06,359 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 387 transitions. [2021-06-12 19:56:06,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:06,359 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:06,359 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:06,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1552 [2021-06-12 19:56:06,560 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:06,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:06,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1991902172, now seen corresponding path program 207 times [2021-06-12 19:56:06,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:06,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391124035] [2021-06-12 19:56:06,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:06,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:06,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:06,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391124035] [2021-06-12 19:56:06,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391124035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:06,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377767775] [2021-06-12 19:56:06,760 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 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 [2021-06-12 19:56:06,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:56:06,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:06,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 19:56:06,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:07,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:07,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377767775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:07,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:07,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:07,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540170884] [2021-06-12 19:56:07,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:07,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:07,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:07,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:07,157 INFO L87 Difference]: Start difference. First operand 176 states and 387 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) [2021-06-12 19:56:07,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:07,966 INFO L93 Difference]: Finished difference Result 228 states and 467 transitions. [2021-06-12 19:56:07,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:56:07,967 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 18 [2021-06-12 19:56:07,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:07,967 INFO L225 Difference]: With dead ends: 228 [2021-06-12 19:56:07,967 INFO L226 Difference]: Without dead ends: 217 [2021-06-12 19:56:07,967 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1053.6ms TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:56:07,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-12 19:56:07,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 177. [2021-06-12 19:56:07,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.210227272727273) internal successors, (389), 176 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) [2021-06-12 19:56:07,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 389 transitions. [2021-06-12 19:56:07,969 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 389 transitions. Word has length 18 [2021-06-12 19:56:07,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:07,969 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 389 transitions. [2021-06-12 19:56:07,969 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) [2021-06-12 19:56:07,969 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 389 transitions. [2021-06-12 19:56:07,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:07,970 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:07,970 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:08,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1563 [2021-06-12 19:56:08,181 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:08,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:08,181 INFO L82 PathProgramCache]: Analyzing trace with hash -968473794, now seen corresponding path program 208 times [2021-06-12 19:56:08,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:08,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268240758] [2021-06-12 19:56:08,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:08,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:08,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268240758] [2021-06-12 19:56:08,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268240758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:08,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610771519] [2021-06-12 19:56:08,335 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 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 [2021-06-12 19:56:08,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:08,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:08,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:56:08,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:08,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:08,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610771519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:08,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:08,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:08,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152445749] [2021-06-12 19:56:08,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:08,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:08,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:08,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:08,714 INFO L87 Difference]: Start difference. First operand 177 states and 389 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) [2021-06-12 19:56:09,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:09,513 INFO L93 Difference]: Finished difference Result 237 states and 483 transitions. [2021-06-12 19:56:09,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:56:09,513 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 18 [2021-06-12 19:56:09,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:09,514 INFO L225 Difference]: With dead ends: 237 [2021-06-12 19:56:09,514 INFO L226 Difference]: Without dead ends: 211 [2021-06-12 19:56:09,514 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 973.1ms TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:56:09,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-12 19:56:09,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 176. [2021-06-12 19:56:09,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2114285714285713) internal successors, (387), 175 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) [2021-06-12 19:56:09,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 387 transitions. [2021-06-12 19:56:09,515 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 387 transitions. Word has length 18 [2021-06-12 19:56:09,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:09,515 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 387 transitions. [2021-06-12 19:56:09,516 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) [2021-06-12 19:56:09,516 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 387 transitions. [2021-06-12 19:56:09,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:09,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:09,516 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:09,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1574 [2021-06-12 19:56:09,716 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:09,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:09,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1796718858, now seen corresponding path program 209 times [2021-06-12 19:56:09,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:09,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678536515] [2021-06-12 19:56:09,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:09,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:09,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678536515] [2021-06-12 19:56:09,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678536515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:09,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380620352] [2021-06-12 19:56:09,936 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 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 [2021-06-12 19:56:09,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:56:09,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:09,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:56:09,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:10,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380620352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:10,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:10,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:10,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236059717] [2021-06-12 19:56:10,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:10,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:10,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:10,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:10,321 INFO L87 Difference]: Start difference. First operand 176 states and 387 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) [2021-06-12 19:56:10,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:10,731 INFO L93 Difference]: Finished difference Result 207 states and 439 transitions. [2021-06-12 19:56:10,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:56:10,731 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 18 [2021-06-12 19:56:10,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:10,731 INFO L225 Difference]: With dead ends: 207 [2021-06-12 19:56:10,732 INFO L226 Difference]: Without dead ends: 196 [2021-06-12 19:56:10,732 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 643.0ms TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:56:10,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-12 19:56:10,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 178. [2021-06-12 19:56:10,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.209039548022599) internal successors, (391), 177 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:10,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 391 transitions. [2021-06-12 19:56:10,733 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 391 transitions. Word has length 18 [2021-06-12 19:56:10,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:10,733 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 391 transitions. [2021-06-12 19:56:10,733 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) [2021-06-12 19:56:10,734 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 391 transitions. [2021-06-12 19:56:10,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:10,734 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:10,734 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:10,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1586 [2021-06-12 19:56:10,934 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:10,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:10,934 INFO L82 PathProgramCache]: Analyzing trace with hash -462127528, now seen corresponding path program 210 times [2021-06-12 19:56:10,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:10,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156871135] [2021-06-12 19:56:10,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:11,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:11,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:11,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156871135] [2021-06-12 19:56:11,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156871135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:11,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253175276] [2021-06-12 19:56:11,093 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 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 [2021-06-12 19:56:11,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:56:11,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:11,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:56:11,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:11,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253175276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:11,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:11,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:11,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517260716] [2021-06-12 19:56:11,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:11,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:11,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:11,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:11,510 INFO L87 Difference]: Start difference. First operand 178 states and 391 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) [2021-06-12 19:56:12,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:12,595 INFO L93 Difference]: Finished difference Result 268 states and 536 transitions. [2021-06-12 19:56:12,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:56:12,595 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 18 [2021-06-12 19:56:12,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:12,595 INFO L225 Difference]: With dead ends: 268 [2021-06-12 19:56:12,595 INFO L226 Difference]: Without dead ends: 249 [2021-06-12 19:56:12,595 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1271.3ms TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:56:12,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-12 19:56:12,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 179. [2021-06-12 19:56:12,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.207865168539326) internal successors, (393), 178 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) [2021-06-12 19:56:12,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 393 transitions. [2021-06-12 19:56:12,598 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 393 transitions. Word has length 18 [2021-06-12 19:56:12,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:12,598 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 393 transitions. [2021-06-12 19:56:12,598 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) [2021-06-12 19:56:12,598 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 393 transitions. [2021-06-12 19:56:12,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:12,598 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:12,598 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:12,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1596,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:12,813 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:12,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:12,813 INFO L82 PathProgramCache]: Analyzing trace with hash -999983106, now seen corresponding path program 211 times [2021-06-12 19:56:12,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:12,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242517602] [2021-06-12 19:56:12,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:12,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:12,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:12,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242517602] [2021-06-12 19:56:12,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242517602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:12,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454550504] [2021-06-12 19:56:12,961 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 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 [2021-06-12 19:56:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:12,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:56:12,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:13,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:13,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454550504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:13,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:13,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:13,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825856947] [2021-06-12 19:56:13,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:13,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:13,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:13,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:13,254 INFO L87 Difference]: Start difference. First operand 179 states and 393 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) [2021-06-12 19:56:14,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:14,030 INFO L93 Difference]: Finished difference Result 245 states and 513 transitions. [2021-06-12 19:56:14,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:56:14,030 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 18 [2021-06-12 19:56:14,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:14,030 INFO L225 Difference]: With dead ends: 245 [2021-06-12 19:56:14,030 INFO L226 Difference]: Without dead ends: 226 [2021-06-12 19:56:14,030 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 838.3ms TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:56:14,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-12 19:56:14,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 182. [2021-06-12 19:56:14,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.2209944751381214) internal successors, (402), 181 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) [2021-06-12 19:56:14,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 402 transitions. [2021-06-12 19:56:14,032 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 402 transitions. Word has length 18 [2021-06-12 19:56:14,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:14,032 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 402 transitions. [2021-06-12 19:56:14,032 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) [2021-06-12 19:56:14,032 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 402 transitions. [2021-06-12 19:56:14,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:14,032 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:14,033 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:14,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1609,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:14,233 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:14,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:14,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1015113500, now seen corresponding path program 212 times [2021-06-12 19:56:14,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:14,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373343083] [2021-06-12 19:56:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:14,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:14,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:14,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373343083] [2021-06-12 19:56:14,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373343083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:14,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875668] [2021-06-12 19:56:14,431 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 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 [2021-06-12 19:56:14,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:14,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:14,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:56:14,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:14,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:14,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:14,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:14,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:14,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526474173] [2021-06-12 19:56:14,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:14,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:14,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:14,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:14,812 INFO L87 Difference]: Start difference. First operand 182 states and 402 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) [2021-06-12 19:56:15,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:15,686 INFO L93 Difference]: Finished difference Result 260 states and 519 transitions. [2021-06-12 19:56:15,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:56:15,687 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 18 [2021-06-12 19:56:15,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:15,687 INFO L225 Difference]: With dead ends: 260 [2021-06-12 19:56:15,687 INFO L226 Difference]: Without dead ends: 249 [2021-06-12 19:56:15,687 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1071.4ms TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:56:15,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-12 19:56:15,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 183. [2021-06-12 19:56:15,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.2252747252747254) internal successors, (405), 182 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) [2021-06-12 19:56:15,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 405 transitions. [2021-06-12 19:56:15,689 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 405 transitions. Word has length 18 [2021-06-12 19:56:15,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:15,689 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 405 transitions. [2021-06-12 19:56:15,689 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) [2021-06-12 19:56:15,689 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 405 transitions. [2021-06-12 19:56:15,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:15,689 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:15,689 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:15,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1619,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:15,890 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:15,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:15,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1698620183, now seen corresponding path program 213 times [2021-06-12 19:56:15,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:15,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900648490] [2021-06-12 19:56:15,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:56:15,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:15,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900648490] [2021-06-12 19:56:15,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900648490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:15,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542119900] [2021-06-12 19:56:15,981 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 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 [2021-06-12 19:56:16,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:56:16,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:16,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:56:16,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:56:16,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542119900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:16,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:16,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:56:16,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419571004] [2021-06-12 19:56:16,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:56:16,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:16,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:56:16,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:56:16,176 INFO L87 Difference]: Start difference. First operand 183 states and 405 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) [2021-06-12 19:56:16,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:16,240 INFO L93 Difference]: Finished difference Result 184 states and 405 transitions. [2021-06-12 19:56:16,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:56:16,240 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 18 [2021-06-12 19:56:16,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:16,241 INFO L225 Difference]: With dead ends: 184 [2021-06-12 19:56:16,241 INFO L226 Difference]: Without dead ends: 184 [2021-06-12 19:56:16,241 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 208.0ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:56:16,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-12 19:56:16,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 176. [2021-06-12 19:56:16,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2285714285714286) internal successors, (390), 175 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) [2021-06-12 19:56:16,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 390 transitions. [2021-06-12 19:56:16,242 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 390 transitions. Word has length 18 [2021-06-12 19:56:16,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:16,242 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 390 transitions. [2021-06-12 19:56:16,242 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) [2021-06-12 19:56:16,243 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 390 transitions. [2021-06-12 19:56:16,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:16,243 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:16,243 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:16,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1630 [2021-06-12 19:56:16,443 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:16,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:16,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1945262466, now seen corresponding path program 214 times [2021-06-12 19:56:16,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:16,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881613542] [2021-06-12 19:56:16,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:16,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:16,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881613542] [2021-06-12 19:56:16,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881613542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:16,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913791944] [2021-06-12 19:56:16,595 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 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 [2021-06-12 19:56:16,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:16,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:16,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:56:16,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:16,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:16,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913791944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:16,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:16,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:16,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569464516] [2021-06-12 19:56:16,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:16,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:16,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:16,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:16,927 INFO L87 Difference]: Start difference. First operand 176 states and 390 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) [2021-06-12 19:56:17,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:17,623 INFO L93 Difference]: Finished difference Result 247 states and 500 transitions. [2021-06-12 19:56:17,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:56:17,623 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 18 [2021-06-12 19:56:17,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:17,623 INFO L225 Difference]: With dead ends: 247 [2021-06-12 19:56:17,623 INFO L226 Difference]: Without dead ends: 221 [2021-06-12 19:56:17,623 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 831.0ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:56:17,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-12 19:56:17,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 175. [2021-06-12 19:56:17,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2298850574712645) internal successors, (388), 174 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:17,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 388 transitions. [2021-06-12 19:56:17,625 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 388 transitions. Word has length 18 [2021-06-12 19:56:17,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:17,625 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 388 transitions. [2021-06-12 19:56:17,625 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) [2021-06-12 19:56:17,625 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 388 transitions. [2021-06-12 19:56:17,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:17,625 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:17,625 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:17,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1636,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:17,826 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:17,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:17,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1811849252, now seen corresponding path program 215 times [2021-06-12 19:56:17,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:17,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688468516] [2021-06-12 19:56:17,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:17,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:17,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688468516] [2021-06-12 19:56:17,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688468516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:17,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955547526] [2021-06-12 19:56:17,970 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 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 [2021-06-12 19:56:18,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:56:18,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:18,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:56:18,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:18,247 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 19:56:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:18,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955547526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:18,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:18,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:18,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37956147] [2021-06-12 19:56:18,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:18,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:18,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:18,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:18,370 INFO L87 Difference]: Start difference. First operand 175 states and 388 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) [2021-06-12 19:56:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:19,270 INFO L93 Difference]: Finished difference Result 254 states and 520 transitions. [2021-06-12 19:56:19,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:56:19,270 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 18 [2021-06-12 19:56:19,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:19,271 INFO L225 Difference]: With dead ends: 254 [2021-06-12 19:56:19,271 INFO L226 Difference]: Without dead ends: 227 [2021-06-12 19:56:19,271 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1116.1ms TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:56:19,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-12 19:56:19,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 178. [2021-06-12 19:56:19,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.2429378531073447) internal successors, (397), 177 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) [2021-06-12 19:56:19,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 397 transitions. [2021-06-12 19:56:19,272 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 397 transitions. Word has length 18 [2021-06-12 19:56:19,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:19,272 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 397 transitions. [2021-06-12 19:56:19,272 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) [2021-06-12 19:56:19,273 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 397 transitions. [2021-06-12 19:56:19,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:19,273 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:19,273 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:19,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1648 [2021-06-12 19:56:19,473 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:19,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:19,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1976771778, now seen corresponding path program 216 times [2021-06-12 19:56:19,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:19,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522635332] [2021-06-12 19:56:19,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:19,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:19,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522635332] [2021-06-12 19:56:19,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522635332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:19,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459449082] [2021-06-12 19:56:19,618 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 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 [2021-06-12 19:56:19,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:56:19,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:19,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:56:19,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:19,868 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 19:56:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:20,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459449082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:20,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:20,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:20,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420109383] [2021-06-12 19:56:20,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:20,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:20,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:20,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:20,057 INFO L87 Difference]: Start difference. First operand 178 states and 397 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) [2021-06-12 19:56:21,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:21,321 INFO L93 Difference]: Finished difference Result 284 states and 575 transitions. [2021-06-12 19:56:21,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:56:21,321 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 18 [2021-06-12 19:56:21,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:21,322 INFO L225 Difference]: With dead ends: 284 [2021-06-12 19:56:21,322 INFO L226 Difference]: Without dead ends: 252 [2021-06-12 19:56:21,322 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1452.2ms TimeCoverageRelationStatistics Valid=222, Invalid=968, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:56:21,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-12 19:56:21,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 180. [2021-06-12 19:56:21,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.2513966480446927) internal successors, (403), 179 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) [2021-06-12 19:56:21,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 403 transitions. [2021-06-12 19:56:21,324 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 403 transitions. Word has length 18 [2021-06-12 19:56:21,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:21,324 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 403 transitions. [2021-06-12 19:56:21,324 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) [2021-06-12 19:56:21,324 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 403 transitions. [2021-06-12 19:56:21,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:21,324 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:21,324 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:21,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1659 [2021-06-12 19:56:21,525 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:21,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:21,525 INFO L82 PathProgramCache]: Analyzing trace with hash -89256540, now seen corresponding path program 217 times [2021-06-12 19:56:21,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:21,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162340004] [2021-06-12 19:56:21,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:21,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:21,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162340004] [2021-06-12 19:56:21,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162340004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:21,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350965117] [2021-06-12 19:56:21,701 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 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 [2021-06-12 19:56:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:21,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:56:21,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:22,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350965117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:22,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:22,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:22,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022759941] [2021-06-12 19:56:22,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:22,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:22,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:22,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:22,106 INFO L87 Difference]: Start difference. First operand 180 states and 403 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) [2021-06-12 19:56:22,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:22,560 INFO L93 Difference]: Finished difference Result 198 states and 431 transitions. [2021-06-12 19:56:22,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:56:22,561 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 18 [2021-06-12 19:56:22,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:22,561 INFO L225 Difference]: With dead ends: 198 [2021-06-12 19:56:22,561 INFO L226 Difference]: Without dead ends: 185 [2021-06-12 19:56:22,561 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 688.3ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:56:22,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-06-12 19:56:22,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 181. [2021-06-12 19:56:22,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.25) internal successors, (405), 180 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) [2021-06-12 19:56:22,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 405 transitions. [2021-06-12 19:56:22,563 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 405 transitions. Word has length 18 [2021-06-12 19:56:22,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:22,563 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 405 transitions. [2021-06-12 19:56:22,563 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) [2021-06-12 19:56:22,563 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 405 transitions. [2021-06-12 19:56:22,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:22,563 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:22,563 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:22,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1671 [2021-06-12 19:56:22,764 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:22,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:22,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1666598270, now seen corresponding path program 218 times [2021-06-12 19:56:22,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:22,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519342949] [2021-06-12 19:56:22,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:23,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:23,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519342949] [2021-06-12 19:56:23,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519342949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:23,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307364191] [2021-06-12 19:56:23,040 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 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 [2021-06-12 19:56:23,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:23,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:23,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:56:23,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:23,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:23,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307364191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:23,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:23,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:23,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174362848] [2021-06-12 19:56:23,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:23,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:23,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:23,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:23,437 INFO L87 Difference]: Start difference. First operand 181 states and 405 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) [2021-06-12 19:56:24,325 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 54 [2021-06-12 19:56:24,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:24,487 INFO L93 Difference]: Finished difference Result 211 states and 455 transitions. [2021-06-12 19:56:24,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:56:24,487 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 18 [2021-06-12 19:56:24,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:24,488 INFO L225 Difference]: With dead ends: 211 [2021-06-12 19:56:24,488 INFO L226 Difference]: Without dead ends: 200 [2021-06-12 19:56:24,488 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1265.8ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:56:24,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-12 19:56:24,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 182. [2021-06-12 19:56:24,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.248618784530387) internal successors, (407), 181 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) [2021-06-12 19:56:24,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 407 transitions. [2021-06-12 19:56:24,490 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 407 transitions. Word has length 18 [2021-06-12 19:56:24,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:24,490 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 407 transitions. [2021-06-12 19:56:24,490 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) [2021-06-12 19:56:24,490 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 407 transitions. [2021-06-12 19:56:24,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:24,490 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:24,490 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:24,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1680 [2021-06-12 19:56:24,690 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:24,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:24,691 INFO L82 PathProgramCache]: Analyzing trace with hash -332006940, now seen corresponding path program 219 times [2021-06-12 19:56:24,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:24,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697540885] [2021-06-12 19:56:24,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:24,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:24,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:24,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697540885] [2021-06-12 19:56:24,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697540885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:24,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814792978] [2021-06-12 19:56:24,928 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 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 [2021-06-12 19:56:24,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:56:24,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:24,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:56:24,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:25,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:25,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814792978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:25,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:25,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:25,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802401035] [2021-06-12 19:56:25,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:25,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:25,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:25,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:25,258 INFO L87 Difference]: Start difference. First operand 182 states and 407 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) [2021-06-12 19:56:26,079 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-12 19:56:26,219 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2021-06-12 19:56:26,355 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-06-12 19:56:26,559 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2021-06-12 19:56:26,708 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2021-06-12 19:56:27,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:27,115 INFO L93 Difference]: Finished difference Result 264 states and 548 transitions. [2021-06-12 19:56:27,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:56:27,116 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 18 [2021-06-12 19:56:27,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:27,116 INFO L225 Difference]: With dead ends: 264 [2021-06-12 19:56:27,116 INFO L226 Difference]: Without dead ends: 238 [2021-06-12 19:56:27,116 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1964.6ms TimeCoverageRelationStatistics Valid=251, Invalid=1309, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:56:27,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-12 19:56:27,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 185. [2021-06-12 19:56:27,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.266304347826087) internal successors, (417), 184 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) [2021-06-12 19:56:27,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 417 transitions. [2021-06-12 19:56:27,118 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 417 transitions. Word has length 18 [2021-06-12 19:56:27,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:27,118 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 417 transitions. [2021-06-12 19:56:27,118 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) [2021-06-12 19:56:27,118 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 417 transitions. [2021-06-12 19:56:27,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:27,118 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:27,118 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:27,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1693 [2021-06-12 19:56:27,319 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:27,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:27,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1160252004, now seen corresponding path program 220 times [2021-06-12 19:56:27,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:27,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360143332] [2021-06-12 19:56:27,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:27,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:27,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:27,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:27,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360143332] [2021-06-12 19:56:27,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360143332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:27,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688557533] [2021-06-12 19:56:27,519 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 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 [2021-06-12 19:56:27,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:27,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:27,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:56:27,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:27,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688557533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:27,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:27,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:27,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91382894] [2021-06-12 19:56:27,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:27,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:27,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:27,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:27,889 INFO L87 Difference]: Start difference. First operand 185 states and 417 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) [2021-06-12 19:56:28,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:28,585 INFO L93 Difference]: Finished difference Result 217 states and 472 transitions. [2021-06-12 19:56:28,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:56:28,585 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 18 [2021-06-12 19:56:28,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:28,586 INFO L225 Difference]: With dead ends: 217 [2021-06-12 19:56:28,586 INFO L226 Difference]: Without dead ends: 206 [2021-06-12 19:56:28,586 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 905.0ms TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:56:28,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-06-12 19:56:28,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 187. [2021-06-12 19:56:28,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.263440860215054) internal successors, (421), 186 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) [2021-06-12 19:56:28,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 421 transitions. [2021-06-12 19:56:28,587 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 421 transitions. Word has length 18 [2021-06-12 19:56:28,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:28,588 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 421 transitions. [2021-06-12 19:56:28,588 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) [2021-06-12 19:56:28,588 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 421 transitions. [2021-06-12 19:56:28,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:28,588 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:28,588 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:28,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1703,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:28,793 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:28,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:28,793 INFO L82 PathProgramCache]: Analyzing trace with hash 174339326, now seen corresponding path program 221 times [2021-06-12 19:56:28,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:28,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567856915] [2021-06-12 19:56:28,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:28,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:28,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:28,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567856915] [2021-06-12 19:56:28,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567856915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:28,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020321103] [2021-06-12 19:56:28,982 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 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 [2021-06-12 19:56:29,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:56:29,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:29,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:56:29,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:29,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020321103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:29,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:29,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:29,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910415915] [2021-06-12 19:56:29,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:29,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:29,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:29,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:29,331 INFO L87 Difference]: Start difference. First operand 187 states and 421 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) [2021-06-12 19:56:30,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:30,099 INFO L93 Difference]: Finished difference Result 263 states and 543 transitions. [2021-06-12 19:56:30,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:56:30,099 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 18 [2021-06-12 19:56:30,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:30,100 INFO L225 Difference]: With dead ends: 263 [2021-06-12 19:56:30,100 INFO L226 Difference]: Without dead ends: 244 [2021-06-12 19:56:30,100 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 950.3ms TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:56:30,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-12 19:56:30,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 186. [2021-06-12 19:56:30,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.264864864864865) internal successors, (419), 185 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:30,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 419 transitions. [2021-06-12 19:56:30,102 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 419 transitions. Word has length 18 [2021-06-12 19:56:30,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:30,102 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 419 transitions. [2021-06-12 19:56:30,102 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) [2021-06-12 19:56:30,102 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 419 transitions. [2021-06-12 19:56:30,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:30,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:30,103 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:30,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1714 [2021-06-12 19:56:30,303 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:30,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:30,303 INFO L82 PathProgramCache]: Analyzing trace with hash -363516252, now seen corresponding path program 222 times [2021-06-12 19:56:30,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:30,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677064884] [2021-06-12 19:56:30,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:30,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:30,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:30,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677064884] [2021-06-12 19:56:30,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677064884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:30,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550313255] [2021-06-12 19:56:30,477 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 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 [2021-06-12 19:56:30,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:56:30,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:30,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:56:30,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:30,753 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 19:56:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:30,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550313255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:30,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:30,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:30,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064053925] [2021-06-12 19:56:30,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:30,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:30,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:30,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:30,907 INFO L87 Difference]: Start difference. First operand 186 states and 419 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) [2021-06-12 19:56:31,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:31,812 INFO L93 Difference]: Finished difference Result 265 states and 553 transitions. [2021-06-12 19:56:31,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:56:31,812 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 18 [2021-06-12 19:56:31,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:31,813 INFO L225 Difference]: With dead ends: 265 [2021-06-12 19:56:31,813 INFO L226 Difference]: Without dead ends: 204 [2021-06-12 19:56:31,813 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1124.0ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:56:31,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-12 19:56:31,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 188. [2021-06-12 19:56:31,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2620320855614975) internal successors, (423), 187 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) [2021-06-12 19:56:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 423 transitions. [2021-06-12 19:56:31,815 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 423 transitions. Word has length 18 [2021-06-12 19:56:31,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:31,815 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 423 transitions. [2021-06-12 19:56:31,815 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) [2021-06-12 19:56:31,815 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 423 transitions. [2021-06-12 19:56:31,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:31,815 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:31,815 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:32,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1727,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:32,016 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:32,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:32,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1651580354, now seen corresponding path program 223 times [2021-06-12 19:56:32,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:32,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172344369] [2021-06-12 19:56:32,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:32,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:32,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172344369] [2021-06-12 19:56:32,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172344369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:32,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427031036] [2021-06-12 19:56:32,213 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 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 [2021-06-12 19:56:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:32,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:56:32,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:32,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427031036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:32,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:32,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:32,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024952288] [2021-06-12 19:56:32,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:32,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:32,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:32,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:32,590 INFO L87 Difference]: Start difference. First operand 188 states and 423 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) [2021-06-12 19:56:33,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:33,293 INFO L93 Difference]: Finished difference Result 245 states and 511 transitions. [2021-06-12 19:56:33,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:56:33,293 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 18 [2021-06-12 19:56:33,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:33,294 INFO L225 Difference]: With dead ends: 245 [2021-06-12 19:56:33,294 INFO L226 Difference]: Without dead ends: 213 [2021-06-12 19:56:33,294 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 894.1ms TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:56:33,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-12 19:56:33,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 190. [2021-06-12 19:56:33,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.259259259259259) internal successors, (427), 189 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:33,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 427 transitions. [2021-06-12 19:56:33,296 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 427 transitions. Word has length 18 [2021-06-12 19:56:33,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:33,296 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 427 transitions. [2021-06-12 19:56:33,296 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) [2021-06-12 19:56:33,296 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 427 transitions. [2021-06-12 19:56:33,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:33,296 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:33,296 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:33,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1739,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:33,497 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:33,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:33,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1846651190, now seen corresponding path program 224 times [2021-06-12 19:56:33,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:33,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995773929] [2021-06-12 19:56:33,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:33,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:33,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:33,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995773929] [2021-06-12 19:56:33,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995773929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:33,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507068440] [2021-06-12 19:56:33,695 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 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 [2021-06-12 19:56:33,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:33,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:33,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:56:33,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:33,973 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 19:56:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:34,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507068440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:34,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:34,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:34,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355239097] [2021-06-12 19:56:34,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:34,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:34,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:34,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:34,103 INFO L87 Difference]: Start difference. First operand 190 states and 427 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) [2021-06-12 19:56:34,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:34,695 INFO L93 Difference]: Finished difference Result 266 states and 546 transitions. [2021-06-12 19:56:34,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:56:34,695 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 18 [2021-06-12 19:56:34,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:34,696 INFO L225 Difference]: With dead ends: 266 [2021-06-12 19:56:34,696 INFO L226 Difference]: Without dead ends: 234 [2021-06-12 19:56:34,696 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 891.3ms TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:56:34,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-12 19:56:34,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 189. [2021-06-12 19:56:34,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.2606382978723403) internal successors, (425), 188 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:34,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 425 transitions. [2021-06-12 19:56:34,698 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 425 transitions. Word has length 18 [2021-06-12 19:56:34,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:34,698 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 425 transitions. [2021-06-12 19:56:34,698 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) [2021-06-12 19:56:34,698 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 425 transitions. [2021-06-12 19:56:34,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:34,698 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:34,698 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:34,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1750 [2021-06-12 19:56:34,899 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:34,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:34,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1340304924, now seen corresponding path program 225 times [2021-06-12 19:56:34,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:34,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638868903] [2021-06-12 19:56:34,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:34,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:35,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:35,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638868903] [2021-06-12 19:56:35,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638868903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:35,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196610401] [2021-06-12 19:56:35,050 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 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 [2021-06-12 19:56:35,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:56:35,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:35,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:56:35,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:35,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196610401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:35,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:35,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:35,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028644882] [2021-06-12 19:56:35,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:35,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:35,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:35,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:35,403 INFO L87 Difference]: Start difference. First operand 189 states and 425 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) [2021-06-12 19:56:36,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:36,085 INFO L93 Difference]: Finished difference Result 270 states and 554 transitions. [2021-06-12 19:56:36,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:56:36,085 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 18 [2021-06-12 19:56:36,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:36,086 INFO L225 Difference]: With dead ends: 270 [2021-06-12 19:56:36,086 INFO L226 Difference]: Without dead ends: 235 [2021-06-12 19:56:36,086 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 809.2ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:56:36,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-12 19:56:36,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 188. [2021-06-12 19:56:36,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2620320855614975) internal successors, (423), 187 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) [2021-06-12 19:56:36,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 423 transitions. [2021-06-12 19:56:36,088 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 423 transitions. Word has length 18 [2021-06-12 19:56:36,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:36,088 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 423 transitions. [2021-06-12 19:56:36,088 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) [2021-06-12 19:56:36,088 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 423 transitions. [2021-06-12 19:56:36,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:36,088 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:36,088 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:36,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1761 [2021-06-12 19:56:36,288 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:36,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:36,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1375929764, now seen corresponding path program 226 times [2021-06-12 19:56:36,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:36,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730613646] [2021-06-12 19:56:36,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:36,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:36,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:36,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730613646] [2021-06-12 19:56:36,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730613646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:36,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932603410] [2021-06-12 19:56:36,529 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 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 [2021-06-12 19:56:36,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:36,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:36,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:56:36,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:36,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932603410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:36,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:36,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:36,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495427895] [2021-06-12 19:56:36,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:36,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:36,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:36,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:36,870 INFO L87 Difference]: Start difference. First operand 188 states and 423 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) [2021-06-12 19:56:38,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:38,050 INFO L93 Difference]: Finished difference Result 265 states and 542 transitions. [2021-06-12 19:56:38,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:56:38,050 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 18 [2021-06-12 19:56:38,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:38,050 INFO L225 Difference]: With dead ends: 265 [2021-06-12 19:56:38,050 INFO L226 Difference]: Without dead ends: 233 [2021-06-12 19:56:38,051 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1346.9ms TimeCoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:56:38,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-12 19:56:38,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 188. [2021-06-12 19:56:38,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2566844919786098) internal successors, (422), 187 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:38,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 422 transitions. [2021-06-12 19:56:38,052 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 422 transitions. Word has length 18 [2021-06-12 19:56:38,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:38,052 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 422 transitions. [2021-06-12 19:56:38,052 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) [2021-06-12 19:56:38,052 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 422 transitions. [2021-06-12 19:56:38,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:38,053 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:38,053 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:38,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1771 [2021-06-12 19:56:38,253 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:38,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:38,253 INFO L82 PathProgramCache]: Analyzing trace with hash -579194012, now seen corresponding path program 227 times [2021-06-12 19:56:38,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:38,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521356362] [2021-06-12 19:56:38,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:38,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:38,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521356362] [2021-06-12 19:56:38,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521356362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:38,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023083717] [2021-06-12 19:56:38,406 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 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 [2021-06-12 19:56:38,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:56:38,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:38,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:56:38,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:38,687 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 19:56:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:38,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023083717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:38,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:38,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:38,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582864510] [2021-06-12 19:56:38,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:38,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:38,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:38,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:38,823 INFO L87 Difference]: Start difference. First operand 188 states and 422 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) [2021-06-12 19:56:39,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:39,340 INFO L93 Difference]: Finished difference Result 267 states and 547 transitions. [2021-06-12 19:56:39,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:56:39,340 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 18 [2021-06-12 19:56:39,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:39,340 INFO L225 Difference]: With dead ends: 267 [2021-06-12 19:56:39,340 INFO L226 Difference]: Without dead ends: 245 [2021-06-12 19:56:39,341 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 735.2ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:56:39,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-12 19:56:39,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 188. [2021-06-12 19:56:39,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2566844919786098) internal successors, (422), 187 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:39,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 422 transitions. [2021-06-12 19:56:39,343 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 422 transitions. Word has length 18 [2021-06-12 19:56:39,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:39,343 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 422 transitions. [2021-06-12 19:56:39,343 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) [2021-06-12 19:56:39,343 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 422 transitions. [2021-06-12 19:56:39,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:39,343 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:39,343 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:39,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1784,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:39,557 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:39,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:39,557 INFO L82 PathProgramCache]: Analyzing trace with hash -72847746, now seen corresponding path program 228 times [2021-06-12 19:56:39,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:39,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462023003] [2021-06-12 19:56:39,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:39,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:39,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:39,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462023003] [2021-06-12 19:56:39,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462023003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:39,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205274515] [2021-06-12 19:56:39,729 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 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 [2021-06-12 19:56:39,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:56:39,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:39,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:56:39,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:39,977 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 19:56:40,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:40,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205274515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:40,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:40,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:40,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495501354] [2021-06-12 19:56:40,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:40,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:40,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:40,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:40,168 INFO L87 Difference]: Start difference. First operand 188 states and 422 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) [2021-06-12 19:56:41,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:41,246 INFO L93 Difference]: Finished difference Result 305 states and 613 transitions. [2021-06-12 19:56:41,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:56:41,247 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 18 [2021-06-12 19:56:41,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:41,247 INFO L225 Difference]: With dead ends: 305 [2021-06-12 19:56:41,247 INFO L226 Difference]: Without dead ends: 245 [2021-06-12 19:56:41,247 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1294.9ms TimeCoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:56:41,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-12 19:56:41,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 192. [2021-06-12 19:56:41,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.261780104712042) internal successors, (432), 191 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:41,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 432 transitions. [2021-06-12 19:56:41,249 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 432 transitions. Word has length 18 [2021-06-12 19:56:41,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:41,249 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 432 transitions. [2021-06-12 19:56:41,249 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) [2021-06-12 19:56:41,249 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 432 transitions. [2021-06-12 19:56:41,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:41,249 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:41,249 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:41,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1796 [2021-06-12 19:56:41,450 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:41,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:41,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1555982684, now seen corresponding path program 229 times [2021-06-12 19:56:41,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:41,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334645703] [2021-06-12 19:56:41,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:41,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:41,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334645703] [2021-06-12 19:56:41,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334645703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:41,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889650267] [2021-06-12 19:56:41,608 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 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 [2021-06-12 19:56:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:41,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:56:41,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:41,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:41,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889650267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:41,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:41,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:56:41,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843207510] [2021-06-12 19:56:41,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:56:41,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:41,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:56:41,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:56:41,964 INFO L87 Difference]: Start difference. First operand 192 states and 432 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) [2021-06-12 19:56:43,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:43,254 INFO L93 Difference]: Finished difference Result 288 states and 593 transitions. [2021-06-12 19:56:43,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:56:43,254 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 18 [2021-06-12 19:56:43,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:43,255 INFO L225 Difference]: With dead ends: 288 [2021-06-12 19:56:43,255 INFO L226 Difference]: Without dead ends: 250 [2021-06-12 19:56:43,255 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1381.6ms TimeCoverageRelationStatistics Valid=204, Invalid=1356, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:56:43,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-06-12 19:56:43,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 193. [2021-06-12 19:56:43,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.2604166666666665) internal successors, (434), 192 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:43,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 434 transitions. [2021-06-12 19:56:43,256 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 434 transitions. Word has length 18 [2021-06-12 19:56:43,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:43,257 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 434 transitions. [2021-06-12 19:56:43,257 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) [2021-06-12 19:56:43,257 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 434 transitions. [2021-06-12 19:56:43,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:43,257 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:43,257 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:43,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1808 [2021-06-12 19:56:43,457 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:43,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:43,458 INFO L82 PathProgramCache]: Analyzing trace with hash 179489888, now seen corresponding path program 230 times [2021-06-12 19:56:43,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:43,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376510960] [2021-06-12 19:56:43,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:43,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:43,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376510960] [2021-06-12 19:56:43,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376510960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:43,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820352069] [2021-06-12 19:56:43,655 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 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 [2021-06-12 19:56:43,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:43,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:43,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:56:43,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:44,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820352069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:44,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:44,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:44,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605664558] [2021-06-12 19:56:44,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:44,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:44,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:44,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:44,033 INFO L87 Difference]: Start difference. First operand 193 states and 434 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) [2021-06-12 19:56:44,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:44,201 INFO L93 Difference]: Finished difference Result 213 states and 463 transitions. [2021-06-12 19:56:44,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:56:44,201 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 18 [2021-06-12 19:56:44,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:44,202 INFO L225 Difference]: With dead ends: 213 [2021-06-12 19:56:44,202 INFO L226 Difference]: Without dead ends: 200 [2021-06-12 19:56:44,202 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 510.6ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:56:44,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-12 19:56:44,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 194. [2021-06-12 19:56:44,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.2590673575129534) internal successors, (436), 193 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:44,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 436 transitions. [2021-06-12 19:56:44,204 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 436 transitions. Word has length 18 [2021-06-12 19:56:44,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:44,204 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 436 transitions. [2021-06-12 19:56:44,204 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) [2021-06-12 19:56:44,204 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 436 transitions. [2021-06-12 19:56:44,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:44,204 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:44,204 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:44,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1818,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:44,405 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:44,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:44,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1397851842, now seen corresponding path program 231 times [2021-06-12 19:56:44,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:44,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629393521] [2021-06-12 19:56:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:44,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:44,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629393521] [2021-06-12 19:56:44,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629393521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:44,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992918072] [2021-06-12 19:56:44,628 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 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 [2021-06-12 19:56:44,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:56:44,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:44,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 19:56:44,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:45,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992918072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:45,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:45,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:45,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228520167] [2021-06-12 19:56:45,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:45,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:45,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:45,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:45,033 INFO L87 Difference]: Start difference. First operand 194 states and 436 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) [2021-06-12 19:56:45,415 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-06-12 19:56:45,699 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2021-06-12 19:56:46,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:46,213 INFO L93 Difference]: Finished difference Result 277 states and 570 transitions. [2021-06-12 19:56:46,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:56:46,213 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 18 [2021-06-12 19:56:46,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:46,213 INFO L225 Difference]: With dead ends: 277 [2021-06-12 19:56:46,213 INFO L226 Difference]: Without dead ends: 259 [2021-06-12 19:56:46,213 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1472.7ms TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:56:46,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-06-12 19:56:46,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 196. [2021-06-12 19:56:46,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.2666666666666666) internal successors, (442), 195 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:46,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 442 transitions. [2021-06-12 19:56:46,215 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 442 transitions. Word has length 18 [2021-06-12 19:56:46,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:46,216 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 442 transitions. [2021-06-12 19:56:46,216 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) [2021-06-12 19:56:46,216 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 442 transitions. [2021-06-12 19:56:46,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:46,216 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:46,216 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:46,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1829,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:46,416 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:46,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:46,417 INFO L82 PathProgramCache]: Analyzing trace with hash -63260512, now seen corresponding path program 232 times [2021-06-12 19:56:46,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:46,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190150645] [2021-06-12 19:56:46,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:46,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:46,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:46,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190150645] [2021-06-12 19:56:46,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190150645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:46,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330336407] [2021-06-12 19:56:46,585 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 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 [2021-06-12 19:56:46,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:46,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:46,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:56:46,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:46,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330336407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:46,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:46,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:46,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079508224] [2021-06-12 19:56:46,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:46,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:46,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:46,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:46,930 INFO L87 Difference]: Start difference. First operand 196 states and 442 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) [2021-06-12 19:56:47,668 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-12 19:56:47,884 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-06-12 19:56:48,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:48,032 INFO L93 Difference]: Finished difference Result 271 states and 568 transitions. [2021-06-12 19:56:48,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:56:48,032 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 18 [2021-06-12 19:56:48,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:48,032 INFO L225 Difference]: With dead ends: 271 [2021-06-12 19:56:48,032 INFO L226 Difference]: Without dead ends: 252 [2021-06-12 19:56:48,033 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1280.9ms TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:56:48,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-12 19:56:48,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 197. [2021-06-12 19:56:48,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.2653061224489797) internal successors, (444), 196 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:48,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 444 transitions. [2021-06-12 19:56:48,034 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 444 transitions. Word has length 18 [2021-06-12 19:56:48,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:48,034 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 444 transitions. [2021-06-12 19:56:48,034 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) [2021-06-12 19:56:48,034 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 444 transitions. [2021-06-12 19:56:48,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:48,035 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:48,035 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:48,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1840 [2021-06-12 19:56:48,235 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:48,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:48,236 INFO L82 PathProgramCache]: Analyzing trace with hash -684310339, now seen corresponding path program 233 times [2021-06-12 19:56:48,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:48,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555950714] [2021-06-12 19:56:48,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:56:48,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:48,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555950714] [2021-06-12 19:56:48,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555950714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:48,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320194170] [2021-06-12 19:56:48,326 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 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 [2021-06-12 19:56:48,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:56:48,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:48,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:56:48,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:56:48,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320194170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:48,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:48,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:56:48,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350325264] [2021-06-12 19:56:48,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:56:48,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:48,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:56:48,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:56:48,487 INFO L87 Difference]: Start difference. First operand 197 states and 444 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) [2021-06-12 19:56:48,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:48,736 INFO L93 Difference]: Finished difference Result 227 states and 502 transitions. [2021-06-12 19:56:48,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:56:48,737 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 18 [2021-06-12 19:56:48,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:48,737 INFO L225 Difference]: With dead ends: 227 [2021-06-12 19:56:48,737 INFO L226 Difference]: Without dead ends: 227 [2021-06-12 19:56:48,737 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 272.6ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:48,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-12 19:56:48,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 196. [2021-06-12 19:56:48,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.2666666666666666) internal successors, (442), 195 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:48,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 442 transitions. [2021-06-12 19:56:48,739 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 442 transitions. Word has length 18 [2021-06-12 19:56:48,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:48,739 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 442 transitions. [2021-06-12 19:56:48,739 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) [2021-06-12 19:56:48,739 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 442 transitions. [2021-06-12 19:56:48,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:48,739 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:48,739 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:48,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1850 [2021-06-12 19:56:48,940 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:48,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:48,940 INFO L82 PathProgramCache]: Analyzing trace with hash -891505576, now seen corresponding path program 234 times [2021-06-12 19:56:48,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:48,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539932872] [2021-06-12 19:56:48,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:49,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:49,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539932872] [2021-06-12 19:56:49,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539932872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:49,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135681072] [2021-06-12 19:56:49,194 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 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 [2021-06-12 19:56:49,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:56:49,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:49,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:56:49,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:49,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135681072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:49,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:49,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:49,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680996222] [2021-06-12 19:56:49,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:49,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:49,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:49,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:49,570 INFO L87 Difference]: Start difference. First operand 196 states and 442 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) [2021-06-12 19:56:50,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:50,203 INFO L93 Difference]: Finished difference Result 249 states and 526 transitions. [2021-06-12 19:56:50,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:56:50,203 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 18 [2021-06-12 19:56:50,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:50,203 INFO L225 Difference]: With dead ends: 249 [2021-06-12 19:56:50,203 INFO L226 Difference]: Without dead ends: 224 [2021-06-12 19:56:50,203 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 926.1ms TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:56:50,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-12 19:56:50,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 197. [2021-06-12 19:56:50,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.2653061224489797) internal successors, (444), 196 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:50,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 444 transitions. [2021-06-12 19:56:50,205 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 444 transitions. Word has length 18 [2021-06-12 19:56:50,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:50,205 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 444 transitions. [2021-06-12 19:56:50,205 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) [2021-06-12 19:56:50,205 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 444 transitions. [2021-06-12 19:56:50,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:50,205 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:50,206 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:50,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1855 [2021-06-12 19:56:50,406 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:50,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:50,406 INFO L82 PathProgramCache]: Analyzing trace with hash -94769824, now seen corresponding path program 235 times [2021-06-12 19:56:50,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:50,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228158780] [2021-06-12 19:56:50,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:50,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:50,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228158780] [2021-06-12 19:56:50,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228158780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:50,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707687183] [2021-06-12 19:56:50,566 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 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 [2021-06-12 19:56:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:50,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:56:50,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:50,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707687183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:50,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:50,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:50,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171986586] [2021-06-12 19:56:50,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:50,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:50,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:50,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:50,863 INFO L87 Difference]: Start difference. First operand 197 states and 444 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) [2021-06-12 19:56:51,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:51,569 INFO L93 Difference]: Finished difference Result 248 states and 531 transitions. [2021-06-12 19:56:51,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:56:51,569 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 18 [2021-06-12 19:56:51,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:51,570 INFO L225 Difference]: With dead ends: 248 [2021-06-12 19:56:51,570 INFO L226 Difference]: Without dead ends: 214 [2021-06-12 19:56:51,570 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 820.5ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:56:51,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-12 19:56:51,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 194. [2021-06-12 19:56:51,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.2590673575129534) internal successors, (436), 193 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:51,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 436 transitions. [2021-06-12 19:56:51,571 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 436 transitions. Word has length 18 [2021-06-12 19:56:51,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:51,572 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 436 transitions. [2021-06-12 19:56:51,572 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) [2021-06-12 19:56:51,572 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 436 transitions. [2021-06-12 19:56:51,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:51,572 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:51,572 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:51,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1866,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:51,772 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:51,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:51,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1920326782, now seen corresponding path program 236 times [2021-06-12 19:56:51,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:51,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244045083] [2021-06-12 19:56:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:52,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:52,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244045083] [2021-06-12 19:56:52,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244045083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:52,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651550868] [2021-06-12 19:56:52,008 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 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 [2021-06-12 19:56:52,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:52,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:52,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:56:52,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:52,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651550868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:52,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:52,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:52,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090262059] [2021-06-12 19:56:52,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:52,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:52,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:52,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:52,351 INFO L87 Difference]: Start difference. First operand 194 states and 436 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) [2021-06-12 19:56:53,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:53,215 INFO L93 Difference]: Finished difference Result 245 states and 524 transitions. [2021-06-12 19:56:53,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:56:53,215 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 18 [2021-06-12 19:56:53,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:53,215 INFO L225 Difference]: With dead ends: 245 [2021-06-12 19:56:53,216 INFO L226 Difference]: Without dead ends: 238 [2021-06-12 19:56:53,216 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1078.1ms TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:56:53,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-12 19:56:53,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 197. [2021-06-12 19:56:53,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.260204081632653) internal successors, (443), 196 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:53,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 443 transitions. [2021-06-12 19:56:53,217 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 443 transitions. Word has length 18 [2021-06-12 19:56:53,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:53,218 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 443 transitions. [2021-06-12 19:56:53,218 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) [2021-06-12 19:56:53,218 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 443 transitions. [2021-06-12 19:56:53,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:53,218 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:53,218 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:53,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1876 [2021-06-12 19:56:53,418 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:53,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:53,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1040049184, now seen corresponding path program 237 times [2021-06-12 19:56:53,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:53,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913707121] [2021-06-12 19:56:53,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:53,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:53,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:53,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913707121] [2021-06-12 19:56:53,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913707121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:53,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390388343] [2021-06-12 19:56:53,571 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 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 [2021-06-12 19:56:53,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:56:53,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:53,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:56:53,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:53,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390388343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:53,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:53,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:53,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729553362] [2021-06-12 19:56:53,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:53,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:53,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:53,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:53,929 INFO L87 Difference]: Start difference. First operand 197 states and 443 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) [2021-06-12 19:56:54,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:54,583 INFO L93 Difference]: Finished difference Result 269 states and 557 transitions. [2021-06-12 19:56:54,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:56:54,583 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 18 [2021-06-12 19:56:54,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:54,584 INFO L225 Difference]: With dead ends: 269 [2021-06-12 19:56:54,584 INFO L226 Difference]: Without dead ends: 250 [2021-06-12 19:56:54,584 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 831.8ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:56:54,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-06-12 19:56:54,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 197. [2021-06-12 19:56:54,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.260204081632653) internal successors, (443), 196 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:54,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 443 transitions. [2021-06-12 19:56:54,586 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 443 transitions. Word has length 18 [2021-06-12 19:56:54,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:54,586 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 443 transitions. [2021-06-12 19:56:54,586 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) [2021-06-12 19:56:54,586 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 443 transitions. [2021-06-12 19:56:54,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:54,586 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:54,586 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:54,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1889,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:54,786 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:54,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:54,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1577904762, now seen corresponding path program 238 times [2021-06-12 19:56:54,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:54,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386582359] [2021-06-12 19:56:54,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:54,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:54,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:54,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386582359] [2021-06-12 19:56:54,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386582359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:54,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990494490] [2021-06-12 19:56:54,943 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 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 [2021-06-12 19:56:54,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:54,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:54,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:56:54,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:55,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990494490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:55,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:55,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:55,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496965490] [2021-06-12 19:56:55,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:55,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:55,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:55,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:55,249 INFO L87 Difference]: Start difference. First operand 197 states and 443 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) [2021-06-12 19:56:55,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:55,925 INFO L93 Difference]: Finished difference Result 264 states and 561 transitions. [2021-06-12 19:56:55,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:56:55,925 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 18 [2021-06-12 19:56:55,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:55,926 INFO L225 Difference]: With dead ends: 264 [2021-06-12 19:56:55,926 INFO L226 Difference]: Without dead ends: 245 [2021-06-12 19:56:55,926 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 783.3ms TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:56:55,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-12 19:56:55,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 197. [2021-06-12 19:56:55,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.260204081632653) internal successors, (443), 196 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:55,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 443 transitions. [2021-06-12 19:56:55,928 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 443 transitions. Word has length 18 [2021-06-12 19:56:55,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:55,928 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 443 transitions. [2021-06-12 19:56:55,928 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) [2021-06-12 19:56:55,928 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 443 transitions. [2021-06-12 19:56:55,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:55,928 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:55,928 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:56,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1902,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:56,129 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:56,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:56,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1071558496, now seen corresponding path program 239 times [2021-06-12 19:56:56,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:56,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301833334] [2021-06-12 19:56:56,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:56,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:56,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:56,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:56,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301833334] [2021-06-12 19:56:56,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301833334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:56,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776152179] [2021-06-12 19:56:56,322 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 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 [2021-06-12 19:56:56,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:56:56,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:56,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:56:56,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:56,587 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 19:56:56,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:56,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776152179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:56,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:56,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:56,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444267370] [2021-06-12 19:56:56,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:56,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:56,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:56,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:56,784 INFO L87 Difference]: Start difference. First operand 197 states and 443 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) [2021-06-12 19:56:57,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:57,379 INFO L93 Difference]: Finished difference Result 262 states and 553 transitions. [2021-06-12 19:56:57,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:56:57,379 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 18 [2021-06-12 19:56:57,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:57,380 INFO L225 Difference]: With dead ends: 262 [2021-06-12 19:56:57,380 INFO L226 Difference]: Without dead ends: 237 [2021-06-12 19:56:57,380 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 828.4ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:56:57,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-12 19:56:57,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 197. [2021-06-12 19:56:57,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.260204081632653) internal successors, (443), 196 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:57,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 443 transitions. [2021-06-12 19:56:57,382 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 443 transitions. Word has length 18 [2021-06-12 19:56:57,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:57,382 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 443 transitions. [2021-06-12 19:56:57,382 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) [2021-06-12 19:56:57,382 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 443 transitions. [2021-06-12 19:56:57,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:57,382 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:57,382 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:57,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1912 [2021-06-12 19:56:57,583 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:57,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:57,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1107183336, now seen corresponding path program 240 times [2021-06-12 19:56:57,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:57,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700346758] [2021-06-12 19:56:57,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:57,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:57,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700346758] [2021-06-12 19:56:57,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700346758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:57,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430737514] [2021-06-12 19:56:57,796 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 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 [2021-06-12 19:56:57,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:56:57,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:57,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 19:56:57,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:58,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430737514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:58,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:58,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:58,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009302988] [2021-06-12 19:56:58,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:58,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:58,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:58,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:58,165 INFO L87 Difference]: Start difference. First operand 197 states and 443 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) [2021-06-12 19:56:59,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:59,234 INFO L93 Difference]: Finished difference Result 290 states and 589 transitions. [2021-06-12 19:56:59,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:56:59,235 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 18 [2021-06-12 19:56:59,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:59,235 INFO L225 Difference]: With dead ends: 290 [2021-06-12 19:56:59,235 INFO L226 Difference]: Without dead ends: 252 [2021-06-12 19:56:59,235 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1296.0ms TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:56:59,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-12 19:56:59,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 200. [2021-06-12 19:56:59,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.2562814070351758) internal successors, (449), 199 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) [2021-06-12 19:56:59,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 449 transitions. [2021-06-12 19:56:59,237 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 449 transitions. Word has length 18 [2021-06-12 19:56:59,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:59,237 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 449 transitions. [2021-06-12 19:56:59,237 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) [2021-06-12 19:56:59,237 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 449 transitions. [2021-06-12 19:56:59,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:59,237 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:59,237 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:59,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1924,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:59,438 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:59,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:59,438 INFO L82 PathProgramCache]: Analyzing trace with hash -310447584, now seen corresponding path program 241 times [2021-06-12 19:56:59,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:59,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044402796] [2021-06-12 19:56:59,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:59,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:59,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044402796] [2021-06-12 19:56:59,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044402796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:59,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000485317] [2021-06-12 19:56:59,603 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 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 [2021-06-12 19:56:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:59,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:56:59,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:59,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:59,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000485317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:59,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:59,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:56:59,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161122568] [2021-06-12 19:56:59,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:56:59,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:59,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:56:59,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:59,895 INFO L87 Difference]: Start difference. First operand 200 states and 449 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) [2021-06-12 19:57:00,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:00,697 INFO L93 Difference]: Finished difference Result 244 states and 526 transitions. [2021-06-12 19:57:00,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:57:00,697 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 18 [2021-06-12 19:57:00,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:00,697 INFO L225 Difference]: With dead ends: 244 [2021-06-12 19:57:00,697 INFO L226 Difference]: Without dead ends: 219 [2021-06-12 19:57:00,697 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 870.5ms TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:57:00,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-12 19:57:00,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 200. [2021-06-12 19:57:00,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.2562814070351758) internal successors, (449), 199 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) [2021-06-12 19:57:00,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 449 transitions. [2021-06-12 19:57:00,699 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 449 transitions. Word has length 18 [2021-06-12 19:57:00,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:00,699 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 449 transitions. [2021-06-12 19:57:00,699 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) [2021-06-12 19:57:00,699 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 449 transitions. [2021-06-12 19:57:00,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:00,700 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:00,700 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:00,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1935,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:00,900 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:00,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:00,900 INFO L82 PathProgramCache]: Analyzing trace with hash 195898682, now seen corresponding path program 242 times [2021-06-12 19:57:00,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:00,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125251113] [2021-06-12 19:57:00,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:00,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:01,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:01,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125251113] [2021-06-12 19:57:01,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125251113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:01,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211689070] [2021-06-12 19:57:01,117 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 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 [2021-06-12 19:57:01,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:01,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:01,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:57:01,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:01,362 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 19:57:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:01,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211689070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:01,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:01,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:57:01,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312857824] [2021-06-12 19:57:01,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:57:01,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:01,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:57:01,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:01,541 INFO L87 Difference]: Start difference. First operand 200 states and 449 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) [2021-06-12 19:57:02,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:02,592 INFO L93 Difference]: Finished difference Result 260 states and 563 transitions. [2021-06-12 19:57:02,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:57:02,592 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 18 [2021-06-12 19:57:02,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:02,593 INFO L225 Difference]: With dead ends: 260 [2021-06-12 19:57:02,593 INFO L226 Difference]: Without dead ends: 237 [2021-06-12 19:57:02,593 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1295.0ms TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:57:02,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-12 19:57:02,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 205. [2021-06-12 19:57:02,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2745098039215685) internal successors, (464), 204 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:02,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 464 transitions. [2021-06-12 19:57:02,595 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 464 transitions. Word has length 18 [2021-06-12 19:57:02,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:02,595 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 464 transitions. [2021-06-12 19:57:02,595 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) [2021-06-12 19:57:02,595 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 464 transitions. [2021-06-12 19:57:02,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:02,595 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:02,595 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:02,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1945 [2021-06-12 19:57:02,795 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:02,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:02,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1287236256, now seen corresponding path program 243 times [2021-06-12 19:57:02,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:02,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45266148] [2021-06-12 19:57:02,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:02,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:02,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45266148] [2021-06-12 19:57:02,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45266148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:02,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357718537] [2021-06-12 19:57:02,956 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 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 [2021-06-12 19:57:02,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:57:02,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:02,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:57:02,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:03,228 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-06-12 19:57:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:03,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357718537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:03,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:03,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:57:03,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333715728] [2021-06-12 19:57:03,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:57:03,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:03,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:57:03,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:57:03,479 INFO L87 Difference]: Start difference. First operand 205 states and 464 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) [2021-06-12 19:57:04,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:04,420 INFO L93 Difference]: Finished difference Result 280 states and 598 transitions. [2021-06-12 19:57:04,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:57:04,420 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 18 [2021-06-12 19:57:04,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:04,420 INFO L225 Difference]: With dead ends: 280 [2021-06-12 19:57:04,420 INFO L226 Difference]: Without dead ends: 261 [2021-06-12 19:57:04,421 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1209.3ms TimeCoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:57:04,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-12 19:57:04,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 209. [2021-06-12 19:57:04,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.269230769230769) internal successors, (472), 208 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) [2021-06-12 19:57:04,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 472 transitions. [2021-06-12 19:57:04,422 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 472 transitions. Word has length 18 [2021-06-12 19:57:04,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:04,423 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 472 transitions. [2021-06-12 19:57:04,423 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) [2021-06-12 19:57:04,423 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 472 transitions. [2021-06-12 19:57:04,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:04,423 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:04,423 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:04,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1956,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:04,625 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:04,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:04,625 INFO L82 PathProgramCache]: Analyzing trace with hash -682872100, now seen corresponding path program 244 times [2021-06-12 19:57:04,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:04,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589379373] [2021-06-12 19:57:04,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:04,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:04,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:04,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589379373] [2021-06-12 19:57:04,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589379373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:04,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850898237] [2021-06-12 19:57:04,864 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 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 [2021-06-12 19:57:04,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:04,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:04,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:57:04,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:05,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850898237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:05,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:05,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:57:05,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24073569] [2021-06-12 19:57:05,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:57:05,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:05,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:57:05,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:05,206 INFO L87 Difference]: Start difference. First operand 209 states and 472 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) [2021-06-12 19:57:05,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:05,996 INFO L93 Difference]: Finished difference Result 314 states and 641 transitions. [2021-06-12 19:57:05,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:57:05,996 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 18 [2021-06-12 19:57:05,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:05,997 INFO L225 Difference]: With dead ends: 314 [2021-06-12 19:57:05,997 INFO L226 Difference]: Without dead ends: 300 [2021-06-12 19:57:05,997 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1012.8ms TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:57:05,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-12 19:57:05,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 210. [2021-06-12 19:57:05,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.272727272727273) internal successors, (475), 209 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:05,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 475 transitions. [2021-06-12 19:57:05,999 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 475 transitions. Word has length 18 [2021-06-12 19:57:05,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:05,999 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 475 transitions. [2021-06-12 19:57:05,999 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) [2021-06-12 19:57:05,999 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 475 transitions. [2021-06-12 19:57:05,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:05,999 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:05,999 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:06,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1968 [2021-06-12 19:57:06,200 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:06,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:06,200 INFO L82 PathProgramCache]: Analyzing trace with hash 113863652, now seen corresponding path program 245 times [2021-06-12 19:57:06,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:06,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939975270] [2021-06-12 19:57:06,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:06,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:06,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939975270] [2021-06-12 19:57:06,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939975270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:06,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334729201] [2021-06-12 19:57:06,375 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 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 [2021-06-12 19:57:06,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:57:06,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:06,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:57:06,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:06,649 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 19:57:06,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:06,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334729201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:06,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:06,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:57:06,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027110275] [2021-06-12 19:57:06,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:57:06,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:06,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:57:06,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:06,786 INFO L87 Difference]: Start difference. First operand 210 states and 475 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) [2021-06-12 19:57:07,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:07,303 INFO L93 Difference]: Finished difference Result 298 states and 626 transitions. [2021-06-12 19:57:07,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:57:07,303 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 18 [2021-06-12 19:57:07,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:07,303 INFO L225 Difference]: With dead ends: 298 [2021-06-12 19:57:07,303 INFO L226 Difference]: Without dead ends: 269 [2021-06-12 19:57:07,303 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 782.2ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:57:07,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-06-12 19:57:07,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 212. [2021-06-12 19:57:07,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2701421800947865) internal successors, (479), 211 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) [2021-06-12 19:57:07,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 479 transitions. [2021-06-12 19:57:07,305 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 479 transitions. Word has length 18 [2021-06-12 19:57:07,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:07,306 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 479 transitions. [2021-06-12 19:57:07,306 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) [2021-06-12 19:57:07,306 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 479 transitions. [2021-06-12 19:57:07,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:07,306 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:07,306 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:07,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1981,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:07,506 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:07,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:07,507 INFO L82 PathProgramCache]: Analyzing trace with hash 620209918, now seen corresponding path program 246 times [2021-06-12 19:57:07,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:07,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372575019] [2021-06-12 19:57:07,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:07,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:07,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372575019] [2021-06-12 19:57:07,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372575019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:07,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713194148] [2021-06-12 19:57:07,641 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 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 [2021-06-12 19:57:07,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:57:07,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:07,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:57:07,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:07,898 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 19:57:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:08,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713194148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:08,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:08,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:57:08,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689686987] [2021-06-12 19:57:08,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:57:08,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:08,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:57:08,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:08,113 INFO L87 Difference]: Start difference. First operand 212 states and 479 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) [2021-06-12 19:57:08,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:08,777 INFO L93 Difference]: Finished difference Result 289 states and 611 transitions. [2021-06-12 19:57:08,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:57:08,777 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 18 [2021-06-12 19:57:08,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:08,778 INFO L225 Difference]: With dead ends: 289 [2021-06-12 19:57:08,778 INFO L226 Difference]: Without dead ends: 251 [2021-06-12 19:57:08,778 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 859.7ms TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:57:08,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-12 19:57:08,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 213. [2021-06-12 19:57:08,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.268867924528302) internal successors, (481), 212 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:08,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 481 transitions. [2021-06-12 19:57:08,780 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 481 transitions. Word has length 18 [2021-06-12 19:57:08,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:08,780 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 481 transitions. [2021-06-12 19:57:08,780 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) [2021-06-12 19:57:08,780 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 481 transitions. [2021-06-12 19:57:08,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:08,780 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:08,780 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:08,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1993 [2021-06-12 19:57:08,982 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:08,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:08,982 INFO L82 PathProgramCache]: Analyzing trace with hash -862925020, now seen corresponding path program 247 times [2021-06-12 19:57:08,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:08,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62539105] [2021-06-12 19:57:08,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:09,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:09,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62539105] [2021-06-12 19:57:09,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62539105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:09,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712173927] [2021-06-12 19:57:09,217 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 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 [2021-06-12 19:57:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:09,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:57:09,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:09,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:09,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712173927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:09,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:09,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:57:09,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370819090] [2021-06-12 19:57:09,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:57:09,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:09,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:57:09,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:57:09,577 INFO L87 Difference]: Start difference. First operand 213 states and 481 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) [2021-06-12 19:57:10,144 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-06-12 19:57:10,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:10,859 INFO L93 Difference]: Finished difference Result 327 states and 687 transitions. [2021-06-12 19:57:10,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:57:10,860 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 18 [2021-06-12 19:57:10,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:10,860 INFO L225 Difference]: With dead ends: 327 [2021-06-12 19:57:10,860 INFO L226 Difference]: Without dead ends: 308 [2021-06-12 19:57:10,860 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1417.2ms TimeCoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:57:10,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-12 19:57:10,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 213. [2021-06-12 19:57:10,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.268867924528302) internal successors, (481), 212 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:10,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 481 transitions. [2021-06-12 19:57:10,862 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 481 transitions. Word has length 18 [2021-06-12 19:57:10,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:10,862 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 481 transitions. [2021-06-12 19:57:10,862 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) [2021-06-12 19:57:10,862 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 481 transitions. [2021-06-12 19:57:10,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:10,863 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:10,863 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:11,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2005,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:11,063 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:11,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:11,064 INFO L82 PathProgramCache]: Analyzing trace with hash -17953568, now seen corresponding path program 248 times [2021-06-12 19:57:11,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:11,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188353871] [2021-06-12 19:57:11,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:11,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:11,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188353871] [2021-06-12 19:57:11,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188353871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:11,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473598356] [2021-06-12 19:57:11,215 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 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 [2021-06-12 19:57:11,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:11,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:11,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 19:57:11,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:11,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:11,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473598356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:11,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:11,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:57:11,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702236207] [2021-06-12 19:57:11,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:57:11,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:11,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:57:11,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:57:11,580 INFO L87 Difference]: Start difference. First operand 213 states and 481 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) [2021-06-12 19:57:12,283 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-06-12 19:57:13,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:13,146 INFO L93 Difference]: Finished difference Result 333 states and 693 transitions. [2021-06-12 19:57:13,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:57:13,146 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 18 [2021-06-12 19:57:13,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:13,147 INFO L225 Difference]: With dead ends: 333 [2021-06-12 19:57:13,147 INFO L226 Difference]: Without dead ends: 300 [2021-06-12 19:57:13,147 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1624.5ms TimeCoverageRelationStatistics Valid=215, Invalid=1425, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 19:57:13,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-12 19:57:13,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 215. [2021-06-12 19:57:13,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2663551401869158) internal successors, (485), 214 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) [2021-06-12 19:57:13,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 485 transitions. [2021-06-12 19:57:13,149 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 485 transitions. Word has length 18 [2021-06-12 19:57:13,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:13,149 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 485 transitions. [2021-06-12 19:57:13,149 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) [2021-06-12 19:57:13,149 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 485 transitions. [2021-06-12 19:57:13,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:13,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:13,150 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:13,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2015 [2021-06-12 19:57:13,357 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:13,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:13,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1401880791, now seen corresponding path program 249 times [2021-06-12 19:57:13,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:13,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833887086] [2021-06-12 19:57:13,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:13,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:13,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833887086] [2021-06-12 19:57:13,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833887086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:13,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883283117] [2021-06-12 19:57:13,453 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 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 [2021-06-12 19:57:13,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:57:13,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:13,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:57:13,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:13,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883283117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:13,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:13,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:13,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474291326] [2021-06-12 19:57:13,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:13,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:13,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:13,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:13,708 INFO L87 Difference]: Start difference. First operand 215 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) [2021-06-12 19:57:13,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:13,990 INFO L93 Difference]: Finished difference Result 278 states and 600 transitions. [2021-06-12 19:57:13,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:57:13,991 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 [2021-06-12 19:57:13,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:13,991 INFO L225 Difference]: With dead ends: 278 [2021-06-12 19:57:13,992 INFO L226 Difference]: Without dead ends: 278 [2021-06-12 19:57:13,992 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 380.4ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:57:13,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-12 19:57:13,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 218. [2021-06-12 19:57:13,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.262672811059908) internal successors, (491), 217 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) [2021-06-12 19:57:13,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 491 transitions. [2021-06-12 19:57:13,994 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 491 transitions. Word has length 19 [2021-06-12 19:57:13,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:13,994 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 491 transitions. [2021-06-12 19:57:13,995 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) [2021-06-12 19:57:13,995 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 491 transitions. [2021-06-12 19:57:13,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:13,995 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:13,995 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:14,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2025 [2021-06-12 19:57:14,202 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:14,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:14,202 INFO L82 PathProgramCache]: Analyzing trace with hash 357408349, now seen corresponding path program 250 times [2021-06-12 19:57:14,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:14,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039771733] [2021-06-12 19:57:14,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:14,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:14,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039771733] [2021-06-12 19:57:14,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039771733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:14,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587923892] [2021-06-12 19:57:14,295 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 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 [2021-06-12 19:57:14,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:14,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:14,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:14,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:14,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:14,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587923892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:14,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:14,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:14,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343176221] [2021-06-12 19:57:14,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:14,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:14,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:14,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:14,499 INFO L87 Difference]: Start difference. First operand 218 states and 491 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) [2021-06-12 19:57:15,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:15,003 INFO L93 Difference]: Finished difference Result 289 states and 622 transitions. [2021-06-12 19:57:15,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:57:15,004 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 [2021-06-12 19:57:15,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:15,004 INFO L225 Difference]: With dead ends: 289 [2021-06-12 19:57:15,004 INFO L226 Difference]: Without dead ends: 289 [2021-06-12 19:57:15,004 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 546.8ms TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:57:15,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-06-12 19:57:15,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 218. [2021-06-12 19:57:15,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.262672811059908) internal successors, (491), 217 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) [2021-06-12 19:57:15,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 491 transitions. [2021-06-12 19:57:15,006 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 491 transitions. Word has length 19 [2021-06-12 19:57:15,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:15,006 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 491 transitions. [2021-06-12 19:57:15,006 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) [2021-06-12 19:57:15,006 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 491 transitions. [2021-06-12 19:57:15,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:15,007 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:15,007 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:15,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2029 [2021-06-12 19:57:15,207 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:15,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:15,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1516287333, now seen corresponding path program 251 times [2021-06-12 19:57:15,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:15,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166140334] [2021-06-12 19:57:15,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:15,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:15,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166140334] [2021-06-12 19:57:15,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166140334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:15,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178786169] [2021-06-12 19:57:15,302 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 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 [2021-06-12 19:57:15,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:57:15,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:15,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:15,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:15,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178786169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:15,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:15,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:15,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331563992] [2021-06-12 19:57:15,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:15,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:15,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:15,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:15,524 INFO L87 Difference]: Start difference. First operand 218 states and 491 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) [2021-06-12 19:57:16,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:16,102 INFO L93 Difference]: Finished difference Result 286 states and 616 transitions. [2021-06-12 19:57:16,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:57:16,102 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 [2021-06-12 19:57:16,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:16,103 INFO L225 Difference]: With dead ends: 286 [2021-06-12 19:57:16,103 INFO L226 Difference]: Without dead ends: 286 [2021-06-12 19:57:16,103 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 627.3ms TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:57:16,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-12 19:57:16,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 218. [2021-06-12 19:57:16,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.262672811059908) internal successors, (491), 217 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) [2021-06-12 19:57:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 491 transitions. [2021-06-12 19:57:16,108 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 491 transitions. Word has length 19 [2021-06-12 19:57:16,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:16,108 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 491 transitions. [2021-06-12 19:57:16,109 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) [2021-06-12 19:57:16,109 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 491 transitions. [2021-06-12 19:57:16,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:16,109 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:16,109 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:16,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2034 [2021-06-12 19:57:16,309 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:16,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:16,310 INFO L82 PathProgramCache]: Analyzing trace with hash 445291869, now seen corresponding path program 252 times [2021-06-12 19:57:16,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:16,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515279227] [2021-06-12 19:57:16,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:16,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:16,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:16,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515279227] [2021-06-12 19:57:16,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515279227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:16,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712430565] [2021-06-12 19:57:16,408 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 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 [2021-06-12 19:57:16,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:57:16,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:16,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:16,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:16,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712430565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:16,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:16,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:16,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081209887] [2021-06-12 19:57:16,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:16,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:16,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:16,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:16,656 INFO L87 Difference]: Start difference. First operand 218 states and 491 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) [2021-06-12 19:57:17,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:17,266 INFO L93 Difference]: Finished difference Result 284 states and 612 transitions. [2021-06-12 19:57:17,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:57:17,267 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 [2021-06-12 19:57:17,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:17,267 INFO L225 Difference]: With dead ends: 284 [2021-06-12 19:57:17,267 INFO L226 Difference]: Without dead ends: 284 [2021-06-12 19:57:17,267 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 654.9ms TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:57:17,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-12 19:57:17,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 219. [2021-06-12 19:57:17,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.261467889908257) internal successors, (493), 218 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:17,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 493 transitions. [2021-06-12 19:57:17,269 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 493 transitions. Word has length 19 [2021-06-12 19:57:17,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:17,269 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 493 transitions. [2021-06-12 19:57:17,269 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) [2021-06-12 19:57:17,269 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 493 transitions. [2021-06-12 19:57:17,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:17,270 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:17,270 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:17,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2039 [2021-06-12 19:57:17,470 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:17,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:17,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1242027621, now seen corresponding path program 253 times [2021-06-12 19:57:17,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:17,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75961756] [2021-06-12 19:57:17,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:17,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:17,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75961756] [2021-06-12 19:57:17,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75961756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:17,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157679955] [2021-06-12 19:57:17,570 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 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 [2021-06-12 19:57:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:17,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:17,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:17,807 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:17,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157679955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:17,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:17,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:17,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182699690] [2021-06-12 19:57:17,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:17,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:17,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:17,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:17,808 INFO L87 Difference]: Start difference. First operand 219 states and 493 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) [2021-06-12 19:57:18,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:18,492 INFO L93 Difference]: Finished difference Result 285 states and 611 transitions. [2021-06-12 19:57:18,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:57:18,492 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 [2021-06-12 19:57:18,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:18,492 INFO L225 Difference]: With dead ends: 285 [2021-06-12 19:57:18,492 INFO L226 Difference]: Without dead ends: 282 [2021-06-12 19:57:18,492 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 738.8ms TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:57:18,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-12 19:57:18,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 220. [2021-06-12 19:57:18,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:18,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-06-12 19:57:18,495 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-06-12 19:57:18,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:18,495 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-06-12 19:57:18,495 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) [2021-06-12 19:57:18,495 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-06-12 19:57:18,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:18,495 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:18,495 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:18,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2044,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:18,696 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:18,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:18,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1925543582, now seen corresponding path program 254 times [2021-06-12 19:57:18,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:18,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42481740] [2021-06-12 19:57:18,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:18,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:18,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42481740] [2021-06-12 19:57:18,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42481740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:18,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829312067] [2021-06-12 19:57:18,792 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 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 [2021-06-12 19:57:18,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:18,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:18,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:18,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:19,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829312067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:19,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:19,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:19,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428668860] [2021-06-12 19:57:19,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:19,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:19,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:19,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:19,076 INFO L87 Difference]: Start difference. First operand 220 states and 495 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) [2021-06-12 19:57:19,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:19,592 INFO L93 Difference]: Finished difference Result 267 states and 578 transitions. [2021-06-12 19:57:19,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:57:19,592 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 [2021-06-12 19:57:19,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:19,592 INFO L225 Difference]: With dead ends: 267 [2021-06-12 19:57:19,592 INFO L226 Difference]: Without dead ends: 267 [2021-06-12 19:57:19,593 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 658.9ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:57:19,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-06-12 19:57:19,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 220. [2021-06-12 19:57:19,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:19,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-06-12 19:57:19,594 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-06-12 19:57:19,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:19,594 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-06-12 19:57:19,595 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) [2021-06-12 19:57:19,595 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-06-12 19:57:19,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:19,595 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:19,595 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:19,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2051,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:19,795 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:19,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:19,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1418186439, now seen corresponding path program 255 times [2021-06-12 19:57:19,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:19,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139997545] [2021-06-12 19:57:19,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:19,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:19,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139997545] [2021-06-12 19:57:19,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139997545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:19,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044528587] [2021-06-12 19:57:19,890 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 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 [2021-06-12 19:57:19,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:57:19,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:19,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:57:19,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:20,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044528587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:20,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:20,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:20,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493078746] [2021-06-12 19:57:20,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:20,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:20,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:20,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:20,101 INFO L87 Difference]: Start difference. First operand 220 states and 495 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) [2021-06-12 19:57:20,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:20,454 INFO L93 Difference]: Finished difference Result 252 states and 555 transitions. [2021-06-12 19:57:20,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:57:20,455 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 [2021-06-12 19:57:20,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:20,455 INFO L225 Difference]: With dead ends: 252 [2021-06-12 19:57:20,455 INFO L226 Difference]: Without dead ends: 252 [2021-06-12 19:57:20,455 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 397.7ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:57:20,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-12 19:57:20,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 220. [2021-06-12 19:57:20,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:20,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-06-12 19:57:20,457 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-06-12 19:57:20,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:20,457 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-06-12 19:57:20,457 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) [2021-06-12 19:57:20,457 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-06-12 19:57:20,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:20,457 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:20,457 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:20,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2059,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:20,658 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:20,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:20,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1717901873, now seen corresponding path program 256 times [2021-06-12 19:57:20,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:20,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286411931] [2021-06-12 19:57:20,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:20,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:20,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286411931] [2021-06-12 19:57:20,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286411931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:20,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561563286] [2021-06-12 19:57:20,749 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 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 [2021-06-12 19:57:20,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:20,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:20,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:20,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:21,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561563286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:21,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:21,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:21,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489907084] [2021-06-12 19:57:21,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:21,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:21,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:21,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:21,006 INFO L87 Difference]: Start difference. First operand 220 states and 495 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) [2021-06-12 19:57:21,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:21,347 INFO L93 Difference]: Finished difference Result 264 states and 579 transitions. [2021-06-12 19:57:21,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:57:21,347 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 [2021-06-12 19:57:21,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:21,348 INFO L225 Difference]: With dead ends: 264 [2021-06-12 19:57:21,348 INFO L226 Difference]: Without dead ends: 264 [2021-06-12 19:57:21,348 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 416.1ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:57:21,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-12 19:57:21,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 220. [2021-06-12 19:57:21,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:21,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-06-12 19:57:21,350 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-06-12 19:57:21,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:21,350 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-06-12 19:57:21,350 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) [2021-06-12 19:57:21,350 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-06-12 19:57:21,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:21,350 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:21,350 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:21,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2064 [2021-06-12 19:57:21,553 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:21,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:21,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1506069959, now seen corresponding path program 257 times [2021-06-12 19:57:21,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:21,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628016413] [2021-06-12 19:57:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:21,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:21,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628016413] [2021-06-12 19:57:21,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628016413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:21,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475394824] [2021-06-12 19:57:21,646 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 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 [2021-06-12 19:57:21,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:57:21,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:21,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:21,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:21,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475394824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:21,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:21,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:21,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607261174] [2021-06-12 19:57:21,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:21,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:21,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:21,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:21,878 INFO L87 Difference]: Start difference. First operand 220 states and 495 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) [2021-06-12 19:57:22,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:22,201 INFO L93 Difference]: Finished difference Result 261 states and 573 transitions. [2021-06-12 19:57:22,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:57:22,201 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 [2021-06-12 19:57:22,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:22,201 INFO L225 Difference]: With dead ends: 261 [2021-06-12 19:57:22,201 INFO L226 Difference]: Without dead ends: 261 [2021-06-12 19:57:22,201 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 413.1ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:57:22,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-12 19:57:22,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 220. [2021-06-12 19:57:22,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:22,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-06-12 19:57:22,203 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-06-12 19:57:22,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:22,203 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-06-12 19:57:22,203 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) [2021-06-12 19:57:22,204 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-06-12 19:57:22,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:22,204 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:22,204 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:22,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2069 [2021-06-12 19:57:22,404 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:22,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:22,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1992161585, now seen corresponding path program 258 times [2021-06-12 19:57:22,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:22,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654885300] [2021-06-12 19:57:22,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:22,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:22,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654885300] [2021-06-12 19:57:22,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654885300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:22,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334489404] [2021-06-12 19:57:22,492 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 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 [2021-06-12 19:57:22,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:57:22,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:22,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:22,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:22,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334489404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:22,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:22,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:22,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744368154] [2021-06-12 19:57:22,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:22,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:22,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:22,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:22,718 INFO L87 Difference]: Start difference. First operand 220 states and 495 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) [2021-06-12 19:57:23,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:23,078 INFO L93 Difference]: Finished difference Result 258 states and 567 transitions. [2021-06-12 19:57:23,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:57:23,078 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 [2021-06-12 19:57:23,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:23,078 INFO L225 Difference]: With dead ends: 258 [2021-06-12 19:57:23,078 INFO L226 Difference]: Without dead ends: 258 [2021-06-12 19:57:23,079 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 417.2ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:57:23,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-06-12 19:57:23,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 220. [2021-06-12 19:57:23,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:23,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-06-12 19:57:23,081 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-06-12 19:57:23,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:23,081 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-06-12 19:57:23,081 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) [2021-06-12 19:57:23,081 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-06-12 19:57:23,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:23,081 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:23,081 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:23,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2074,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:23,281 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:23,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:23,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1704611350, now seen corresponding path program 259 times [2021-06-12 19:57:23,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:23,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864996012] [2021-06-12 19:57:23,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:23,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:23,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:23,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864996012] [2021-06-12 19:57:23,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864996012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:23,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460715131] [2021-06-12 19:57:23,378 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 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 [2021-06-12 19:57:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:23,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:23,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:23,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460715131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:23,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:23,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:23,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868600577] [2021-06-12 19:57:23,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:23,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:23,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:23,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:23,654 INFO L87 Difference]: Start difference. First operand 220 states and 495 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) [2021-06-12 19:57:23,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:23,921 INFO L93 Difference]: Finished difference Result 243 states and 539 transitions. [2021-06-12 19:57:23,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:57:23,922 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 [2021-06-12 19:57:23,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:23,922 INFO L225 Difference]: With dead ends: 243 [2021-06-12 19:57:23,922 INFO L226 Difference]: Without dead ends: 243 [2021-06-12 19:57:23,922 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 391.3ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:57:23,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-06-12 19:57:23,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 215. [2021-06-12 19:57:23,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 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) [2021-06-12 19:57:23,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-06-12 19:57:23,924 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-06-12 19:57:23,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:23,924 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-06-12 19:57:23,924 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) [2021-06-12 19:57:23,924 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-06-12 19:57:23,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:23,924 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:23,924 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:24,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2081,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:24,125 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:24,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:24,125 INFO L82 PathProgramCache]: Analyzing trace with hash -450444695, now seen corresponding path program 260 times [2021-06-12 19:57:24,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:24,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993377734] [2021-06-12 19:57:24,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:24,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:24,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993377734] [2021-06-12 19:57:24,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993377734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:24,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632113989] [2021-06-12 19:57:24,221 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 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 [2021-06-12 19:57:24,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:24,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:24,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:24,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:24,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632113989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:24,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:24,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:24,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31165839] [2021-06-12 19:57:24,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:24,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:24,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:24,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:24,429 INFO L87 Difference]: Start difference. First operand 215 states and 483 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) [2021-06-12 19:57:24,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:24,634 INFO L93 Difference]: Finished difference Result 254 states and 557 transitions. [2021-06-12 19:57:24,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:57:24,634 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 [2021-06-12 19:57:24,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:24,634 INFO L225 Difference]: With dead ends: 254 [2021-06-12 19:57:24,635 INFO L226 Difference]: Without dead ends: 254 [2021-06-12 19:57:24,635 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 266.6ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:57:24,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-12 19:57:24,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 217. [2021-06-12 19:57:24,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.2546296296296298) internal successors, (487), 216 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:24,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 487 transitions. [2021-06-12 19:57:24,637 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 487 transitions. Word has length 19 [2021-06-12 19:57:24,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:24,637 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 487 transitions. [2021-06-12 19:57:24,637 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) [2021-06-12 19:57:24,637 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 487 transitions. [2021-06-12 19:57:24,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:24,637 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:24,637 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:24,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2089 [2021-06-12 19:57:24,849 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:24,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:24,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1521440159, now seen corresponding path program 261 times [2021-06-12 19:57:24,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:24,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596697520] [2021-06-12 19:57:24,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:24,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:24,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596697520] [2021-06-12 19:57:24,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596697520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:24,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893907376] [2021-06-12 19:57:24,940 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 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 [2021-06-12 19:57:24,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:57:24,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:24,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:24,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:25,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893907376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:25,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:25,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:25,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567368012] [2021-06-12 19:57:25,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:25,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:25,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:25,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:25,171 INFO L87 Difference]: Start difference. First operand 217 states and 487 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) [2021-06-12 19:57:25,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:25,653 INFO L93 Difference]: Finished difference Result 266 states and 581 transitions. [2021-06-12 19:57:25,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:57:25,653 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 [2021-06-12 19:57:25,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:25,654 INFO L225 Difference]: With dead ends: 266 [2021-06-12 19:57:25,654 INFO L226 Difference]: Without dead ends: 266 [2021-06-12 19:57:25,654 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 485.8ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:57:25,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-12 19:57:25,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 219. [2021-06-12 19:57:25,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.261467889908257) internal successors, (493), 218 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:25,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 493 transitions. [2021-06-12 19:57:25,656 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 493 transitions. Word has length 19 [2021-06-12 19:57:25,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:25,656 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 493 transitions. [2021-06-12 19:57:25,656 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) [2021-06-12 19:57:25,656 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 493 transitions. [2021-06-12 19:57:25,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:25,656 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:25,656 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:25,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2094,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:25,857 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:25,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:25,857 INFO L82 PathProgramCache]: Analyzing trace with hash -724704407, now seen corresponding path program 262 times [2021-06-12 19:57:25,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:25,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887788936] [2021-06-12 19:57:25,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:25,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:25,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887788936] [2021-06-12 19:57:25,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887788936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:25,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081599382] [2021-06-12 19:57:25,958 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 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 [2021-06-12 19:57:25,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:25,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:25,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:25,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:26,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081599382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:26,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:26,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:26,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357143889] [2021-06-12 19:57:26,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:26,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:26,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:26,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:26,167 INFO L87 Difference]: Start difference. First operand 219 states and 493 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) [2021-06-12 19:57:26,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:26,401 INFO L93 Difference]: Finished difference Result 260 states and 571 transitions. [2021-06-12 19:57:26,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:57:26,401 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 [2021-06-12 19:57:26,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:26,401 INFO L225 Difference]: With dead ends: 260 [2021-06-12 19:57:26,401 INFO L226 Difference]: Without dead ends: 260 [2021-06-12 19:57:26,402 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 304.3ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:57:26,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-12 19:57:26,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 221. [2021-06-12 19:57:26,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2590909090909093) internal successors, (497), 220 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) [2021-06-12 19:57:26,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 497 transitions. [2021-06-12 19:57:26,404 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 497 transitions. Word has length 19 [2021-06-12 19:57:26,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:26,404 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 497 transitions. [2021-06-12 19:57:26,404 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) [2021-06-12 19:57:26,404 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 497 transitions. [2021-06-12 19:57:26,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:26,404 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:26,404 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:26,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2099,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:26,605 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:26,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:26,605 INFO L82 PathProgramCache]: Analyzing trace with hash -437154172, now seen corresponding path program 263 times [2021-06-12 19:57:26,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:26,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911412989] [2021-06-12 19:57:26,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:26,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:26,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:26,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:26,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911412989] [2021-06-12 19:57:26,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911412989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:26,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046129945] [2021-06-12 19:57:26,695 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 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 [2021-06-12 19:57:26,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:57:26,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:26,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:26,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:26,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046129945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:26,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:26,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:26,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513337526] [2021-06-12 19:57:26,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:26,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:26,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:26,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:26,957 INFO L87 Difference]: Start difference. First operand 221 states and 497 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) [2021-06-12 19:57:27,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:27,244 INFO L93 Difference]: Finished difference Result 252 states and 556 transitions. [2021-06-12 19:57:27,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:57:27,244 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 [2021-06-12 19:57:27,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:27,244 INFO L225 Difference]: With dead ends: 252 [2021-06-12 19:57:27,244 INFO L226 Difference]: Without dead ends: 252 [2021-06-12 19:57:27,244 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 398.8ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:57:27,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-12 19:57:27,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 217. [2021-06-12 19:57:27,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.2546296296296298) internal successors, (487), 216 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:27,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 487 transitions. [2021-06-12 19:57:27,246 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 487 transitions. Word has length 19 [2021-06-12 19:57:27,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:27,246 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 487 transitions. [2021-06-12 19:57:27,246 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) [2021-06-12 19:57:27,247 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 487 transitions. [2021-06-12 19:57:27,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:27,247 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:27,247 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:27,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2106 [2021-06-12 19:57:27,447 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:27,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:27,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1290392199, now seen corresponding path program 264 times [2021-06-12 19:57:27,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:27,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649501677] [2021-06-12 19:57:27,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:27,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:27,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649501677] [2021-06-12 19:57:27,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649501677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:27,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502675779] [2021-06-12 19:57:27,563 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 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 [2021-06-12 19:57:27,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:57:27,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:27,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:27,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:27,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502675779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:27,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:27,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:27,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930814798] [2021-06-12 19:57:27,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:27,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:27,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:27,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:27,769 INFO L87 Difference]: Start difference. First operand 217 states and 487 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) [2021-06-12 19:57:28,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:28,078 INFO L93 Difference]: Finished difference Result 255 states and 559 transitions. [2021-06-12 19:57:28,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:57:28,079 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 [2021-06-12 19:57:28,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:28,079 INFO L225 Difference]: With dead ends: 255 [2021-06-12 19:57:28,079 INFO L226 Difference]: Without dead ends: 255 [2021-06-12 19:57:28,079 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 368.7ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:57:28,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-12 19:57:28,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 219. [2021-06-12 19:57:28,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.2522935779816513) internal successors, (491), 218 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) [2021-06-12 19:57:28,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 491 transitions. [2021-06-12 19:57:28,081 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 491 transitions. Word has length 19 [2021-06-12 19:57:28,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:28,081 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 491 transitions. [2021-06-12 19:57:28,081 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) [2021-06-12 19:57:28,081 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 491 transitions. [2021-06-12 19:57:28,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:28,081 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:28,081 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:28,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2114 [2021-06-12 19:57:28,282 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:28,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:28,282 INFO L82 PathProgramCache]: Analyzing trace with hash 2087127951, now seen corresponding path program 265 times [2021-06-12 19:57:28,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:28,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779093237] [2021-06-12 19:57:28,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:28,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:28,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779093237] [2021-06-12 19:57:28,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779093237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:28,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611250081] [2021-06-12 19:57:28,395 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 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 [2021-06-12 19:57:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:28,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:28,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:28,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611250081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:28,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:28,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:28,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880333517] [2021-06-12 19:57:28,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:28,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:28,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:28,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:28,597 INFO L87 Difference]: Start difference. First operand 219 states and 491 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) [2021-06-12 19:57:28,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:28,934 INFO L93 Difference]: Finished difference Result 261 states and 571 transitions. [2021-06-12 19:57:28,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:57:28,934 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 [2021-06-12 19:57:28,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:28,934 INFO L225 Difference]: With dead ends: 261 [2021-06-12 19:57:28,934 INFO L226 Difference]: Without dead ends: 261 [2021-06-12 19:57:28,934 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 370.1ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:57:28,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-12 19:57:28,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 220. [2021-06-12 19:57:28,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.2511415525114153) internal successors, (493), 219 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:28,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 493 transitions. [2021-06-12 19:57:28,936 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 493 transitions. Word has length 19 [2021-06-12 19:57:28,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:28,937 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 493 transitions. [2021-06-12 19:57:28,937 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) [2021-06-12 19:57:28,937 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 493 transitions. [2021-06-12 19:57:28,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:28,937 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:28,937 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:29,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2119 [2021-06-12 19:57:29,137 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:29,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:29,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1920289110, now seen corresponding path program 266 times [2021-06-12 19:57:29,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:29,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741214209] [2021-06-12 19:57:29,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:29,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:29,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741214209] [2021-06-12 19:57:29,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741214209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:29,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458164579] [2021-06-12 19:57:29,250 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 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 [2021-06-12 19:57:29,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:29,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:29,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:29,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:29,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458164579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:29,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:29,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:29,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686839066] [2021-06-12 19:57:29,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:29,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:29,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:29,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:29,495 INFO L87 Difference]: Start difference. First operand 220 states and 493 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) [2021-06-12 19:57:29,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:29,905 INFO L93 Difference]: Finished difference Result 256 states and 561 transitions. [2021-06-12 19:57:29,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:57:29,905 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 [2021-06-12 19:57:29,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:29,906 INFO L225 Difference]: With dead ends: 256 [2021-06-12 19:57:29,906 INFO L226 Difference]: Without dead ends: 256 [2021-06-12 19:57:29,906 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 482.8ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:57:29,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-12 19:57:29,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 218. [2021-06-12 19:57:29,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2534562211981566) internal successors, (489), 217 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:29,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 489 transitions. [2021-06-12 19:57:29,908 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 489 transitions. Word has length 19 [2021-06-12 19:57:29,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:29,908 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 489 transitions. [2021-06-12 19:57:29,908 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) [2021-06-12 19:57:29,908 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 489 transitions. [2021-06-12 19:57:29,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:29,908 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:29,908 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:30,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2126,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:30,109 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:30,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:30,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1701493079, now seen corresponding path program 267 times [2021-06-12 19:57:30,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:30,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532325905] [2021-06-12 19:57:30,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:30,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:30,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:30,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532325905] [2021-06-12 19:57:30,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532325905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:30,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792086300] [2021-06-12 19:57:30,233 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 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 [2021-06-12 19:57:30,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:57:30,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:30,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:30,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:30,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792086300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:30,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:30,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:30,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888196487] [2021-06-12 19:57:30,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:30,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:30,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:30,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:30,509 INFO L87 Difference]: Start difference. First operand 218 states and 489 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) [2021-06-12 19:57:31,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:31,138 INFO L93 Difference]: Finished difference Result 285 states and 602 transitions. [2021-06-12 19:57:31,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:57:31,138 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 [2021-06-12 19:57:31,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:31,138 INFO L225 Difference]: With dead ends: 285 [2021-06-12 19:57:31,138 INFO L226 Difference]: Without dead ends: 285 [2021-06-12 19:57:31,138 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 753.6ms TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:57:31,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-06-12 19:57:31,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 231. [2021-06-12 19:57:31,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.234782608695652) internal successors, (514), 230 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) [2021-06-12 19:57:31,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 514 transitions. [2021-06-12 19:57:31,140 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 514 transitions. Word has length 19 [2021-06-12 19:57:31,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:31,141 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 514 transitions. [2021-06-12 19:57:31,141 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) [2021-06-12 19:57:31,141 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 514 transitions. [2021-06-12 19:57:31,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:31,141 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:31,141 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:31,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2134 [2021-06-12 19:57:31,341 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:31,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:31,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1413942844, now seen corresponding path program 268 times [2021-06-12 19:57:31,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:31,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939461493] [2021-06-12 19:57:31,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:31,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:31,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939461493] [2021-06-12 19:57:31,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939461493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:31,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018110017] [2021-06-12 19:57:31,457 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 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 [2021-06-12 19:57:31,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:31,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:31,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:31,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:31,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018110017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:31,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:31,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:31,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129431295] [2021-06-12 19:57:31,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:31,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:31,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:31,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:31,666 INFO L87 Difference]: Start difference. First operand 231 states and 514 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) [2021-06-12 19:57:32,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:32,209 INFO L93 Difference]: Finished difference Result 337 states and 704 transitions. [2021-06-12 19:57:32,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:57:32,209 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 [2021-06-12 19:57:32,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:32,209 INFO L225 Difference]: With dead ends: 337 [2021-06-12 19:57:32,210 INFO L226 Difference]: Without dead ends: 337 [2021-06-12 19:57:32,210 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 569.4ms TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:57:32,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-12 19:57:32,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 232. [2021-06-12 19:57:32,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.2467532467532467) internal successors, (519), 231 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) [2021-06-12 19:57:32,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 519 transitions. [2021-06-12 19:57:32,212 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 519 transitions. Word has length 19 [2021-06-12 19:57:32,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:32,212 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 519 transitions. [2021-06-12 19:57:32,212 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) [2021-06-12 19:57:32,212 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 519 transitions. [2021-06-12 19:57:32,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:32,212 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:32,212 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:32,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2142,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:32,413 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:32,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:32,413 INFO L82 PathProgramCache]: Analyzing trace with hash 920989127, now seen corresponding path program 269 times [2021-06-12 19:57:32,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:32,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232710882] [2021-06-12 19:57:32,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:32,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:32,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232710882] [2021-06-12 19:57:32,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232710882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:32,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761914059] [2021-06-12 19:57:32,529 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 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 [2021-06-12 19:57:32,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:57:32,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:32,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:32,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:32,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761914059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:32,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:32,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:32,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386136219] [2021-06-12 19:57:32,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:32,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:32,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:32,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:32,808 INFO L87 Difference]: Start difference. First operand 232 states and 519 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) [2021-06-12 19:57:33,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:33,113 INFO L93 Difference]: Finished difference Result 253 states and 555 transitions. [2021-06-12 19:57:33,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:57:33,113 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 [2021-06-12 19:57:33,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:33,113 INFO L225 Difference]: With dead ends: 253 [2021-06-12 19:57:33,113 INFO L226 Difference]: Without dead ends: 247 [2021-06-12 19:57:33,113 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 463.2ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:57:33,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-12 19:57:33,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 223. [2021-06-12 19:57:33,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.265765765765766) internal successors, (503), 222 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:33,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 503 transitions. [2021-06-12 19:57:33,115 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 503 transitions. Word has length 19 [2021-06-12 19:57:33,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:33,115 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 503 transitions. [2021-06-12 19:57:33,115 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) [2021-06-12 19:57:33,115 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 503 transitions. [2021-06-12 19:57:33,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:33,115 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:33,115 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:33,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2149,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:33,316 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:33,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:33,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1111952564, now seen corresponding path program 270 times [2021-06-12 19:57:33,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:33,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897040025] [2021-06-12 19:57:33,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:33,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:33,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897040025] [2021-06-12 19:57:33,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897040025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:33,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315640501] [2021-06-12 19:57:33,452 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 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 [2021-06-12 19:57:33,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:57:33,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:33,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:33,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:33,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315640501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:33,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:33,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:33,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090687822] [2021-06-12 19:57:33,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:33,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:33,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:33,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:33,701 INFO L87 Difference]: Start difference. First operand 223 states and 503 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) [2021-06-12 19:57:34,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:34,112 INFO L93 Difference]: Finished difference Result 279 states and 607 transitions. [2021-06-12 19:57:34,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:57:34,112 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 [2021-06-12 19:57:34,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:34,113 INFO L225 Difference]: With dead ends: 279 [2021-06-12 19:57:34,113 INFO L226 Difference]: Without dead ends: 279 [2021-06-12 19:57:34,113 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 497.6ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:57:34,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-06-12 19:57:34,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 221. [2021-06-12 19:57:34,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2545454545454544) internal successors, (496), 220 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) [2021-06-12 19:57:34,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 496 transitions. [2021-06-12 19:57:34,115 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 496 transitions. Word has length 19 [2021-06-12 19:57:34,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:34,115 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 496 transitions. [2021-06-12 19:57:34,115 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) [2021-06-12 19:57:34,115 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 496 transitions. [2021-06-12 19:57:34,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:34,115 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:34,115 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:34,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2157 [2021-06-12 19:57:34,316 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:34,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:34,316 INFO L82 PathProgramCache]: Analyzing trace with hash -57431139, now seen corresponding path program 271 times [2021-06-12 19:57:34,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:34,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086368094] [2021-06-12 19:57:34,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:34,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:34,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086368094] [2021-06-12 19:57:34,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086368094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:34,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524957693] [2021-06-12 19:57:34,406 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 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 [2021-06-12 19:57:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:34,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:34,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:34,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:34,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524957693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:34,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:34,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:34,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132497085] [2021-06-12 19:57:34,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:34,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:34,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:34,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:34,613 INFO L87 Difference]: Start difference. First operand 221 states and 496 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) [2021-06-12 19:57:34,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:34,929 INFO L93 Difference]: Finished difference Result 247 states and 546 transitions. [2021-06-12 19:57:34,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:57:34,930 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 [2021-06-12 19:57:34,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:34,930 INFO L225 Difference]: With dead ends: 247 [2021-06-12 19:57:34,930 INFO L226 Difference]: Without dead ends: 247 [2021-06-12 19:57:34,930 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 383.3ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:57:34,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-12 19:57:34,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 222. [2021-06-12 19:57:34,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.253393665158371) internal successors, (498), 221 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) [2021-06-12 19:57:34,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 498 transitions. [2021-06-12 19:57:34,932 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 498 transitions. Word has length 19 [2021-06-12 19:57:34,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:34,932 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 498 transitions. [2021-06-12 19:57:34,932 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) [2021-06-12 19:57:34,932 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 498 transitions. [2021-06-12 19:57:34,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:34,932 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:34,932 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:35,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2162,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:35,133 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:35,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:35,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1101447845, now seen corresponding path program 272 times [2021-06-12 19:57:35,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:35,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41496641] [2021-06-12 19:57:35,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:35,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:35,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41496641] [2021-06-12 19:57:35,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41496641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:35,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528100579] [2021-06-12 19:57:35,226 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 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 [2021-06-12 19:57:35,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:35,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:35,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:57:35,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:35,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:35,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528100579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:35,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:35,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:35,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82617488] [2021-06-12 19:57:35,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:35,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:35,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:35,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:35,519 INFO L87 Difference]: Start difference. First operand 222 states and 498 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) [2021-06-12 19:57:36,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:36,135 INFO L93 Difference]: Finished difference Result 261 states and 574 transitions. [2021-06-12 19:57:36,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:57:36,135 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 [2021-06-12 19:57:36,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:36,136 INFO L225 Difference]: With dead ends: 261 [2021-06-12 19:57:36,136 INFO L226 Difference]: Without dead ends: 261 [2021-06-12 19:57:36,136 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 768.5ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:57:36,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-12 19:57:36,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 223. [2021-06-12 19:57:36,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.2522522522522523) internal successors, (500), 222 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) [2021-06-12 19:57:36,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 500 transitions. [2021-06-12 19:57:36,138 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 500 transitions. Word has length 19 [2021-06-12 19:57:36,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:36,138 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 500 transitions. [2021-06-12 19:57:36,138 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) [2021-06-12 19:57:36,138 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 500 transitions. [2021-06-12 19:57:36,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:36,138 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:36,138 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:36,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2167 [2021-06-12 19:57:36,339 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:36,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:36,339 INFO L82 PathProgramCache]: Analyzing trace with hash 30452381, now seen corresponding path program 273 times [2021-06-12 19:57:36,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:36,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727171278] [2021-06-12 19:57:36,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:36,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:36,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727171278] [2021-06-12 19:57:36,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727171278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:36,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651981924] [2021-06-12 19:57:36,438 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 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 [2021-06-12 19:57:36,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:57:36,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:36,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 19:57:36,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:36,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651981924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:36,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:36,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-12 19:57:36,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041871199] [2021-06-12 19:57:36,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:57:36,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:36,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:57:36,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:57:36,873 INFO L87 Difference]: Start difference. First operand 223 states and 500 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 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) [2021-06-12 19:57:37,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:37,568 INFO L93 Difference]: Finished difference Result 270 states and 592 transitions. [2021-06-12 19:57:37,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:57:37,568 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 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 [2021-06-12 19:57:37,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:37,569 INFO L225 Difference]: With dead ends: 270 [2021-06-12 19:57:37,569 INFO L226 Difference]: Without dead ends: 270 [2021-06-12 19:57:37,569 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 861.6ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:57:37,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-12 19:57:37,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 224. [2021-06-12 19:57:37,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2511210762331837) internal successors, (502), 223 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:37,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 502 transitions. [2021-06-12 19:57:37,571 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 502 transitions. Word has length 19 [2021-06-12 19:57:37,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:37,571 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 502 transitions. [2021-06-12 19:57:37,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 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) [2021-06-12 19:57:37,571 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 502 transitions. [2021-06-12 19:57:37,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:37,571 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:37,571 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:37,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2171,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:37,771 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:37,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:37,772 INFO L82 PathProgramCache]: Analyzing trace with hash 827188133, now seen corresponding path program 274 times [2021-06-12 19:57:37,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:37,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618318167] [2021-06-12 19:57:37,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:37,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:37,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618318167] [2021-06-12 19:57:37,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618318167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:37,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224126747] [2021-06-12 19:57:37,867 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 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 [2021-06-12 19:57:37,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:37,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:37,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:37,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:38,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:38,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224126747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:38,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:38,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:38,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377781698] [2021-06-12 19:57:38,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:38,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:38,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:38,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:38,098 INFO L87 Difference]: Start difference. First operand 224 states and 502 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) [2021-06-12 19:57:38,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:38,902 INFO L93 Difference]: Finished difference Result 294 states and 627 transitions. [2021-06-12 19:57:38,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:57:38,902 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 [2021-06-12 19:57:38,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:38,903 INFO L225 Difference]: With dead ends: 294 [2021-06-12 19:57:38,903 INFO L226 Difference]: Without dead ends: 294 [2021-06-12 19:57:38,903 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 820.3ms TimeCoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:57:38,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-12 19:57:38,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 225. [2021-06-12 19:57:38,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.2589285714285716) internal successors, (506), 224 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:38,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 506 transitions. [2021-06-12 19:57:38,905 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 506 transitions. Word has length 19 [2021-06-12 19:57:38,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:38,905 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 506 transitions. [2021-06-12 19:57:38,905 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) [2021-06-12 19:57:38,905 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 506 transitions. [2021-06-12 19:57:38,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:38,905 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:38,905 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:39,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2177 [2021-06-12 19:57:39,106 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:39,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:39,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1303499579, now seen corresponding path program 275 times [2021-06-12 19:57:39,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:39,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182996339] [2021-06-12 19:57:39,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:39,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:39,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182996339] [2021-06-12 19:57:39,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182996339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:39,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954296079] [2021-06-12 19:57:39,196 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 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 [2021-06-12 19:57:39,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:57:39,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:39,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:39,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:39,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:39,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954296079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:39,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:39,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:39,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513548629] [2021-06-12 19:57:39,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:39,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:39,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:39,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:39,431 INFO L87 Difference]: Start difference. First operand 225 states and 506 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) [2021-06-12 19:57:40,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:40,009 INFO L93 Difference]: Finished difference Result 261 states and 570 transitions. [2021-06-12 19:57:40,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:57:40,010 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 [2021-06-12 19:57:40,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:40,010 INFO L225 Difference]: With dead ends: 261 [2021-06-12 19:57:40,010 INFO L226 Difference]: Without dead ends: 258 [2021-06-12 19:57:40,010 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 637.3ms TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:57:40,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-06-12 19:57:40,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 225. [2021-06-12 19:57:40,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.2544642857142856) internal successors, (505), 224 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) [2021-06-12 19:57:40,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 505 transitions. [2021-06-12 19:57:40,012 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 505 transitions. Word has length 19 [2021-06-12 19:57:40,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:40,012 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 505 transitions. [2021-06-12 19:57:40,012 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) [2021-06-12 19:57:40,012 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 505 transitions. [2021-06-12 19:57:40,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:40,013 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:40,013 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:40,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2184 [2021-06-12 19:57:40,213 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:40,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:40,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1954584226, now seen corresponding path program 276 times [2021-06-12 19:57:40,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:40,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792825133] [2021-06-12 19:57:40,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:40,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:40,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792825133] [2021-06-12 19:57:40,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792825133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:40,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117945644] [2021-06-12 19:57:40,306 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 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 [2021-06-12 19:57:40,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:57:40,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:40,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:40,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:40,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:40,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117945644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:40,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:40,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:40,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548641613] [2021-06-12 19:57:40,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:40,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:40,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:40,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:40,605 INFO L87 Difference]: Start difference. First operand 225 states and 505 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) [2021-06-12 19:57:40,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:40,924 INFO L93 Difference]: Finished difference Result 245 states and 540 transitions. [2021-06-12 19:57:40,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:57:40,924 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 [2021-06-12 19:57:40,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:40,924 INFO L225 Difference]: With dead ends: 245 [2021-06-12 19:57:40,924 INFO L226 Difference]: Without dead ends: 243 [2021-06-12 19:57:40,924 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 451.9ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:57:40,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-06-12 19:57:40,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 221. [2021-06-12 19:57:40,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2545454545454544) internal successors, (496), 220 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) [2021-06-12 19:57:40,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 496 transitions. [2021-06-12 19:57:40,926 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 496 transitions. Word has length 19 [2021-06-12 19:57:40,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:40,926 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 496 transitions. [2021-06-12 19:57:40,926 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) [2021-06-12 19:57:40,927 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 496 transitions. [2021-06-12 19:57:40,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:40,927 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:40,927 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:41,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2192,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:41,127 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:41,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:41,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1926062273, now seen corresponding path program 277 times [2021-06-12 19:57:41,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:41,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377557961] [2021-06-12 19:57:41,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:41,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:41,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:41,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377557961] [2021-06-12 19:57:41,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377557961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:41,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829656868] [2021-06-12 19:57:41,230 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 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 [2021-06-12 19:57:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:41,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:41,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:41,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829656868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:41,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:41,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:41,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464934015] [2021-06-12 19:57:41,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:41,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:41,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:41,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:41,438 INFO L87 Difference]: Start difference. First operand 221 states and 496 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) [2021-06-12 19:57:41,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:41,627 INFO L93 Difference]: Finished difference Result 256 states and 562 transitions. [2021-06-12 19:57:41,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:57:41,627 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 [2021-06-12 19:57:41,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:41,627 INFO L225 Difference]: With dead ends: 256 [2021-06-12 19:57:41,627 INFO L226 Difference]: Without dead ends: 256 [2021-06-12 19:57:41,628 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 261.1ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:41,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-12 19:57:41,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 219. [2021-06-12 19:57:41,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.2477064220183487) internal successors, (490), 218 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) [2021-06-12 19:57:41,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 490 transitions. [2021-06-12 19:57:41,630 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 490 transitions. Word has length 19 [2021-06-12 19:57:41,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:41,631 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 490 transitions. [2021-06-12 19:57:41,631 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) [2021-06-12 19:57:41,631 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 490 transitions. [2021-06-12 19:57:41,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:41,631 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:41,631 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:41,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2200 [2021-06-12 19:57:41,845 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:41,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:41,845 INFO L82 PathProgramCache]: Analyzing trace with hash 2094645311, now seen corresponding path program 278 times [2021-06-12 19:57:41,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:41,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951810206] [2021-06-12 19:57:41,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:41,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:41,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951810206] [2021-06-12 19:57:41,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951810206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:41,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015782966] [2021-06-12 19:57:41,943 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 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 [2021-06-12 19:57:41,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:41,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:41,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:41,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:42,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015782966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:42,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:42,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:42,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489365878] [2021-06-12 19:57:42,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:42,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:42,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:42,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:42,161 INFO L87 Difference]: Start difference. First operand 219 states and 490 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) [2021-06-12 19:57:42,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:42,579 INFO L93 Difference]: Finished difference Result 263 states and 576 transitions. [2021-06-12 19:57:42,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:57:42,580 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 [2021-06-12 19:57:42,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:42,580 INFO L225 Difference]: With dead ends: 263 [2021-06-12 19:57:42,580 INFO L226 Difference]: Without dead ends: 263 [2021-06-12 19:57:42,580 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 476.3ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:57:42,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-12 19:57:42,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 216. [2021-06-12 19:57:42,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.2511627906976743) internal successors, (484), 215 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:42,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 484 transitions. [2021-06-12 19:57:42,582 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 484 transitions. Word has length 19 [2021-06-12 19:57:42,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:42,582 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 484 transitions. [2021-06-12 19:57:42,583 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) [2021-06-12 19:57:42,583 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 484 transitions. [2021-06-12 19:57:42,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:42,583 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:42,583 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:42,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2205,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:42,783 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:42,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:42,783 INFO L82 PathProgramCache]: Analyzing trace with hash -554628451, now seen corresponding path program 279 times [2021-06-12 19:57:42,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:42,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674531797] [2021-06-12 19:57:42,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:42,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:42,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674531797] [2021-06-12 19:57:42,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674531797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:42,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185869159] [2021-06-12 19:57:42,907 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 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 [2021-06-12 19:57:42,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:57:42,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:42,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:42,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:43,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185869159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:43,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:43,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:43,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001096242] [2021-06-12 19:57:43,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:43,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:43,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:43,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:43,179 INFO L87 Difference]: Start difference. First operand 216 states and 484 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) [2021-06-12 19:57:43,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:43,452 INFO L93 Difference]: Finished difference Result 240 states and 525 transitions. [2021-06-12 19:57:43,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:57:43,452 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 [2021-06-12 19:57:43,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:43,452 INFO L225 Difference]: With dead ends: 240 [2021-06-12 19:57:43,452 INFO L226 Difference]: Without dead ends: 234 [2021-06-12 19:57:43,452 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 428.1ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:57:43,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-12 19:57:43,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 212. [2021-06-12 19:57:43,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.251184834123223) internal successors, (475), 211 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:43,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 475 transitions. [2021-06-12 19:57:43,454 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 475 transitions. Word has length 19 [2021-06-12 19:57:43,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:43,454 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 475 transitions. [2021-06-12 19:57:43,454 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) [2021-06-12 19:57:43,454 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 475 transitions. [2021-06-12 19:57:43,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:43,454 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:43,455 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:43,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2212 [2021-06-12 19:57:43,655 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:43,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:43,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1289595419, now seen corresponding path program 280 times [2021-06-12 19:57:43,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:43,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469114895] [2021-06-12 19:57:43,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:43,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:43,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469114895] [2021-06-12 19:57:43,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469114895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:43,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669941920] [2021-06-12 19:57:43,751 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 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 [2021-06-12 19:57:43,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:43,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:43,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:43,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:43,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:43,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669941920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:43,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:43,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:43,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945557207] [2021-06-12 19:57:43,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:43,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:43,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:43,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:43,955 INFO L87 Difference]: Start difference. First operand 212 states and 475 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) [2021-06-12 19:57:44,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:44,084 INFO L93 Difference]: Finished difference Result 245 states and 539 transitions. [2021-06-12 19:57:44,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:57:44,085 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 [2021-06-12 19:57:44,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:44,085 INFO L225 Difference]: With dead ends: 245 [2021-06-12 19:57:44,085 INFO L226 Difference]: Without dead ends: 245 [2021-06-12 19:57:44,085 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 219.3ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:44,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-12 19:57:44,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 213. [2021-06-12 19:57:44,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.25) internal successors, (477), 212 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:44,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 477 transitions. [2021-06-12 19:57:44,087 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 477 transitions. Word has length 19 [2021-06-12 19:57:44,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:44,087 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 477 transitions. [2021-06-12 19:57:44,087 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) [2021-06-12 19:57:44,087 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 477 transitions. [2021-06-12 19:57:44,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:44,087 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:44,087 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:44,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2220,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:44,288 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:44,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:44,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1934376413, now seen corresponding path program 281 times [2021-06-12 19:57:44,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:44,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038578202] [2021-06-12 19:57:44,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:44,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:44,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038578202] [2021-06-12 19:57:44,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038578202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:44,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168905082] [2021-06-12 19:57:44,385 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 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 [2021-06-12 19:57:44,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:57:44,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:44,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:44,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:44,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:44,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168905082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:44,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:44,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:44,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874657623] [2021-06-12 19:57:44,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:44,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:44,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:44,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:44,607 INFO L87 Difference]: Start difference. First operand 213 states and 477 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) [2021-06-12 19:57:44,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:44,983 INFO L93 Difference]: Finished difference Result 260 states and 569 transitions. [2021-06-12 19:57:44,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:57:44,984 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 [2021-06-12 19:57:44,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:44,984 INFO L225 Difference]: With dead ends: 260 [2021-06-12 19:57:44,984 INFO L226 Difference]: Without dead ends: 260 [2021-06-12 19:57:44,984 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 428.3ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:57:44,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-12 19:57:44,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 214. [2021-06-12 19:57:44,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.248826291079812) internal successors, (479), 213 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) [2021-06-12 19:57:44,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 479 transitions. [2021-06-12 19:57:44,986 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 479 transitions. Word has length 19 [2021-06-12 19:57:44,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:44,986 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 479 transitions. [2021-06-12 19:57:44,986 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) [2021-06-12 19:57:44,986 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 479 transitions. [2021-06-12 19:57:44,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:44,986 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:44,986 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:45,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2225 [2021-06-12 19:57:45,187 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:45,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:45,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1563855131, now seen corresponding path program 282 times [2021-06-12 19:57:45,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:45,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77972992] [2021-06-12 19:57:45,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:45,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:45,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77972992] [2021-06-12 19:57:45,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77972992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:45,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869081454] [2021-06-12 19:57:45,302 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 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 [2021-06-12 19:57:45,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:57:45,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:45,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:45,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:45,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869081454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:45,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:45,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:45,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603892212] [2021-06-12 19:57:45,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:45,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:45,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:45,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:45,516 INFO L87 Difference]: Start difference. First operand 214 states and 479 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) [2021-06-12 19:57:46,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:46,048 INFO L93 Difference]: Finished difference Result 283 states and 608 transitions. [2021-06-12 19:57:46,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:57:46,049 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 [2021-06-12 19:57:46,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:46,049 INFO L225 Difference]: With dead ends: 283 [2021-06-12 19:57:46,049 INFO L226 Difference]: Without dead ends: 283 [2021-06-12 19:57:46,049 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 592.8ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:57:46,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-12 19:57:46,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 215. [2021-06-12 19:57:46,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 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) [2021-06-12 19:57:46,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-06-12 19:57:46,051 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-06-12 19:57:46,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:46,051 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-06-12 19:57:46,051 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) [2021-06-12 19:57:46,051 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-06-12 19:57:46,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:46,052 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:46,052 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:46,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2230,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:46,252 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:46,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:46,252 INFO L82 PathProgramCache]: Analyzing trace with hash -436459038, now seen corresponding path program 283 times [2021-06-12 19:57:46,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:46,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487007807] [2021-06-12 19:57:46,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:46,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:46,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:46,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487007807] [2021-06-12 19:57:46,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487007807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:46,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751713836] [2021-06-12 19:57:46,348 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 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 [2021-06-12 19:57:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:46,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:46,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:46,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:46,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751713836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:46,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:46,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:46,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534437136] [2021-06-12 19:57:46,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:46,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:46,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:46,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:46,605 INFO L87 Difference]: Start difference. First operand 215 states and 483 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) [2021-06-12 19:57:46,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:46,869 INFO L93 Difference]: Finished difference Result 260 states and 562 transitions. [2021-06-12 19:57:46,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:57:46,869 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 [2021-06-12 19:57:46,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:46,869 INFO L225 Difference]: With dead ends: 260 [2021-06-12 19:57:46,869 INFO L226 Difference]: Without dead ends: 260 [2021-06-12 19:57:46,870 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 371.0ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:57:46,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-12 19:57:46,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 215. [2021-06-12 19:57:46,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 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) [2021-06-12 19:57:46,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-06-12 19:57:46,871 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-06-12 19:57:46,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:46,872 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-06-12 19:57:46,872 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) [2021-06-12 19:57:46,872 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-06-12 19:57:46,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:46,872 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:46,872 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:47,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2237,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:47,072 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:47,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:47,073 INFO L82 PathProgramCache]: Analyzing trace with hash 451241475, now seen corresponding path program 284 times [2021-06-12 19:57:47,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:47,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912937022] [2021-06-12 19:57:47,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:47,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:47,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912937022] [2021-06-12 19:57:47,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912937022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:47,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062093766] [2021-06-12 19:57:47,192 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 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 [2021-06-12 19:57:47,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:47,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:47,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:47,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:47,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062093766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:47,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:47,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:47,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513149764] [2021-06-12 19:57:47,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:47,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:47,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:47,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:47,400 INFO L87 Difference]: Start difference. First operand 215 states and 483 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) [2021-06-12 19:57:47,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:47,630 INFO L93 Difference]: Finished difference Result 238 states and 527 transitions. [2021-06-12 19:57:47,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:57:47,630 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 [2021-06-12 19:57:47,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:47,631 INFO L225 Difference]: With dead ends: 238 [2021-06-12 19:57:47,631 INFO L226 Difference]: Without dead ends: 238 [2021-06-12 19:57:47,631 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 318.8ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:47,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-12 19:57:47,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 216. [2021-06-12 19:57:47,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.255813953488372) internal successors, (485), 215 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) [2021-06-12 19:57:47,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 485 transitions. [2021-06-12 19:57:47,633 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 485 transitions. Word has length 19 [2021-06-12 19:57:47,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:47,633 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 485 transitions. [2021-06-12 19:57:47,633 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) [2021-06-12 19:57:47,633 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 485 transitions. [2021-06-12 19:57:47,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:47,633 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:47,633 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:47,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2245 [2021-06-12 19:57:47,849 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:47,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:47,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1247977227, now seen corresponding path program 285 times [2021-06-12 19:57:47,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:47,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702788060] [2021-06-12 19:57:47,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:47,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:47,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702788060] [2021-06-12 19:57:47,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702788060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:47,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913131979] [2021-06-12 19:57:47,964 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 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 [2021-06-12 19:57:47,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:57:47,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:47,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:47,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:48,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913131979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:48,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:48,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:48,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271897860] [2021-06-12 19:57:48,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:48,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:48,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:48,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:48,174 INFO L87 Difference]: Start difference. First operand 216 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) [2021-06-12 19:57:48,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:48,620 INFO L93 Difference]: Finished difference Result 276 states and 591 transitions. [2021-06-12 19:57:48,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:57:48,620 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 [2021-06-12 19:57:48,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:48,621 INFO L225 Difference]: With dead ends: 276 [2021-06-12 19:57:48,621 INFO L226 Difference]: Without dead ends: 276 [2021-06-12 19:57:48,621 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 546.4ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:57:48,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-06-12 19:57:48,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 217. [2021-06-12 19:57:48,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.259259259259259) internal successors, (488), 216 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:48,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 488 transitions. [2021-06-12 19:57:48,623 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 488 transitions. Word has length 19 [2021-06-12 19:57:48,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:48,623 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 488 transitions. [2021-06-12 19:57:48,623 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) [2021-06-12 19:57:48,623 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 488 transitions. [2021-06-12 19:57:48,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:48,623 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:48,623 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:48,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2250,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:48,824 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:48,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:48,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1724288673, now seen corresponding path program 286 times [2021-06-12 19:57:48,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:48,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194431490] [2021-06-12 19:57:48,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:48,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:48,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194431490] [2021-06-12 19:57:48,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194431490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:48,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816073440] [2021-06-12 19:57:48,936 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 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 [2021-06-12 19:57:48,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:48,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:48,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:48,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:49,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816073440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:49,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:49,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:49,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413282816] [2021-06-12 19:57:49,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:49,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:49,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:49,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:49,140 INFO L87 Difference]: Start difference. First operand 217 states and 488 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) [2021-06-12 19:57:49,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:49,474 INFO L93 Difference]: Finished difference Result 243 states and 534 transitions. [2021-06-12 19:57:49,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:57:49,474 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 [2021-06-12 19:57:49,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:49,474 INFO L225 Difference]: With dead ends: 243 [2021-06-12 19:57:49,474 INFO L226 Difference]: Without dead ends: 240 [2021-06-12 19:57:49,474 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 439.9ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:57:49,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-12 19:57:49,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 217. [2021-06-12 19:57:49,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.2546296296296298) internal successors, (487), 216 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:49,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 487 transitions. [2021-06-12 19:57:49,476 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 487 transitions. Word has length 19 [2021-06-12 19:57:49,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:49,476 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 487 transitions. [2021-06-12 19:57:49,476 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) [2021-06-12 19:57:49,476 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 487 transitions. [2021-06-12 19:57:49,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:49,477 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:49,477 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:49,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2257,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:49,677 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:49,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:49,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1919593976, now seen corresponding path program 287 times [2021-06-12 19:57:49,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:49,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965719461] [2021-06-12 19:57:49,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:49,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:49,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965719461] [2021-06-12 19:57:49,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965719461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:49,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220292419] [2021-06-12 19:57:49,795 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 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 [2021-06-12 19:57:49,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:57:49,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:49,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:49,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:50,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220292419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:50,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:50,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:50,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596012345] [2021-06-12 19:57:50,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:50,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:50,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:50,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:50,040 INFO L87 Difference]: Start difference. First operand 217 states and 487 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) [2021-06-12 19:57:50,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:50,311 INFO L93 Difference]: Finished difference Result 247 states and 545 transitions. [2021-06-12 19:57:50,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:57:50,311 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 [2021-06-12 19:57:50,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:50,311 INFO L225 Difference]: With dead ends: 247 [2021-06-12 19:57:50,311 INFO L226 Difference]: Without dead ends: 247 [2021-06-12 19:57:50,312 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 437.1ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:57:50,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-12 19:57:50,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 215. [2021-06-12 19:57:50,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 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) [2021-06-12 19:57:50,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-06-12 19:57:50,313 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-06-12 19:57:50,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:50,313 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-06-12 19:57:50,314 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) [2021-06-12 19:57:50,314 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-06-12 19:57:50,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:50,314 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:50,314 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:50,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2265 [2021-06-12 19:57:50,514 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:50,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:50,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1754323493, now seen corresponding path program 288 times [2021-06-12 19:57:50,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:50,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593476214] [2021-06-12 19:57:50,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:50,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:50,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:50,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593476214] [2021-06-12 19:57:50,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593476214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:50,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446354295] [2021-06-12 19:57:50,640 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 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 [2021-06-12 19:57:50,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:57:50,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:50,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:50,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:50,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:50,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446354295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:50,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:50,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:50,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999674962] [2021-06-12 19:57:50,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:50,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:50,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:50,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:50,905 INFO L87 Difference]: Start difference. First operand 215 states and 483 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) [2021-06-12 19:57:51,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:51,211 INFO L93 Difference]: Finished difference Result 255 states and 554 transitions. [2021-06-12 19:57:51,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:57:51,212 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 [2021-06-12 19:57:51,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:51,212 INFO L225 Difference]: With dead ends: 255 [2021-06-12 19:57:51,212 INFO L226 Difference]: Without dead ends: 255 [2021-06-12 19:57:51,212 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 447.4ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:57:51,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-12 19:57:51,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 217. [2021-06-12 19:57:51,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.259259259259259) internal successors, (488), 216 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:51,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 488 transitions. [2021-06-12 19:57:51,214 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 488 transitions. Word has length 19 [2021-06-12 19:57:51,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:51,214 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 488 transitions. [2021-06-12 19:57:51,214 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) [2021-06-12 19:57:51,214 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 488 transitions. [2021-06-12 19:57:51,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:51,214 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:51,214 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:51,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2273,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:51,415 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:51,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:51,415 INFO L82 PathProgramCache]: Analyzing trace with hash 2041873728, now seen corresponding path program 289 times [2021-06-12 19:57:51,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:51,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489185250] [2021-06-12 19:57:51,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:51,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:51,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:51,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:51,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489185250] [2021-06-12 19:57:51,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489185250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:51,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398523925] [2021-06-12 19:57:51,553 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 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 [2021-06-12 19:57:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:51,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:51,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:51,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:51,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398523925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:51,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:51,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:51,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621926396] [2021-06-12 19:57:51,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:51,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:51,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:51,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:51,761 INFO L87 Difference]: Start difference. First operand 217 states and 488 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) [2021-06-12 19:57:52,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:52,176 INFO L93 Difference]: Finished difference Result 317 states and 668 transitions. [2021-06-12 19:57:52,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:57:52,176 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 [2021-06-12 19:57:52,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:52,177 INFO L225 Difference]: With dead ends: 317 [2021-06-12 19:57:52,177 INFO L226 Difference]: Without dead ends: 317 [2021-06-12 19:57:52,177 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 477.9ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:57:52,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-12 19:57:52,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 218. [2021-06-12 19:57:52,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.271889400921659) internal successors, (493), 217 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:52,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 493 transitions. [2021-06-12 19:57:52,179 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 493 transitions. Word has length 19 [2021-06-12 19:57:52,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:52,179 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 493 transitions. [2021-06-12 19:57:52,179 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) [2021-06-12 19:57:52,179 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 493 transitions. [2021-06-12 19:57:52,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:52,179 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:52,180 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:52,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2281 [2021-06-12 19:57:52,380 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:52,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:52,380 INFO L82 PathProgramCache]: Analyzing trace with hash 81838403, now seen corresponding path program 290 times [2021-06-12 19:57:52,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:52,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182441438] [2021-06-12 19:57:52,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:52,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:52,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182441438] [2021-06-12 19:57:52,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182441438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:52,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180826850] [2021-06-12 19:57:52,497 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 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 [2021-06-12 19:57:52,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:52,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:52,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:52,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:52,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180826850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:52,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:52,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:52,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087757766] [2021-06-12 19:57:52,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:52,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:52,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:52,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:52,768 INFO L87 Difference]: Start difference. First operand 218 states and 493 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) [2021-06-12 19:57:52,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:52,975 INFO L93 Difference]: Finished difference Result 242 states and 534 transitions. [2021-06-12 19:57:52,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:57:52,975 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 [2021-06-12 19:57:52,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:52,975 INFO L225 Difference]: With dead ends: 242 [2021-06-12 19:57:52,975 INFO L226 Difference]: Without dead ends: 236 [2021-06-12 19:57:52,976 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 383.6ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:57:52,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-12 19:57:52,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 218. [2021-06-12 19:57:52,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2672811059907834) internal successors, (492), 217 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:52,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 492 transitions. [2021-06-12 19:57:52,977 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 492 transitions. Word has length 19 [2021-06-12 19:57:52,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:52,977 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 492 transitions. [2021-06-12 19:57:52,977 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) [2021-06-12 19:57:52,977 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 492 transitions. [2021-06-12 19:57:52,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:52,978 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:52,978 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:53,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2288 [2021-06-12 19:57:53,178 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:53,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:53,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1951103288, now seen corresponding path program 291 times [2021-06-12 19:57:53,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:53,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576869905] [2021-06-12 19:57:53,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:53,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:53,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576869905] [2021-06-12 19:57:53,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576869905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:53,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895693047] [2021-06-12 19:57:53,298 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 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 [2021-06-12 19:57:53,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:57:53,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:53,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:57:53,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:53,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895693047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:53,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:53,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:57:53,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276572801] [2021-06-12 19:57:53,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:53,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:53,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:53,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:53,515 INFO L87 Difference]: Start difference. First operand 218 states and 492 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) [2021-06-12 19:57:53,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:53,823 INFO L93 Difference]: Finished difference Result 265 states and 581 transitions. [2021-06-12 19:57:53,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:57:53,823 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 [2021-06-12 19:57:53,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:53,823 INFO L225 Difference]: With dead ends: 265 [2021-06-12 19:57:53,823 INFO L226 Difference]: Without dead ends: 265 [2021-06-12 19:57:53,823 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 391.5ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:57:53,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-12 19:57:53,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 214. [2021-06-12 19:57:53,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2582159624413145) internal successors, (481), 213 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:53,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 481 transitions. [2021-06-12 19:57:53,825 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 481 transitions. Word has length 19 [2021-06-12 19:57:53,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:53,825 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 481 transitions. [2021-06-12 19:57:53,825 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) [2021-06-12 19:57:53,825 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 481 transitions. [2021-06-12 19:57:53,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:53,826 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:53,826 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:54,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2296,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:54,026 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:54,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:54,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1718698653, now seen corresponding path program 292 times [2021-06-12 19:57:54,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:54,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814206334] [2021-06-12 19:57:54,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:54,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:54,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:54,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814206334] [2021-06-12 19:57:54,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814206334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:54,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874596807] [2021-06-12 19:57:54,154 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 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 [2021-06-12 19:57:54,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:54,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:54,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:54,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:54,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874596807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:54,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:54,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:54,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922066999] [2021-06-12 19:57:54,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:54,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:54,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:54,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:54,365 INFO L87 Difference]: Start difference. First operand 214 states and 481 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) [2021-06-12 19:57:54,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:54,531 INFO L93 Difference]: Finished difference Result 237 states and 525 transitions. [2021-06-12 19:57:54,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:57:54,532 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 [2021-06-12 19:57:54,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:54,532 INFO L225 Difference]: With dead ends: 237 [2021-06-12 19:57:54,532 INFO L226 Difference]: Without dead ends: 237 [2021-06-12 19:57:54,532 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 290.0ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:57:54,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-12 19:57:54,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 215. [2021-06-12 19:57:54,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 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) [2021-06-12 19:57:54,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-06-12 19:57:54,534 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-06-12 19:57:54,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:54,534 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-06-12 19:57:54,534 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) [2021-06-12 19:57:54,534 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-06-12 19:57:54,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:54,534 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:54,534 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:54,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2301,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:54,735 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:54,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:54,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1779532891, now seen corresponding path program 293 times [2021-06-12 19:57:54,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:54,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102667127] [2021-06-12 19:57:54,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:54,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:54,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:54,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102667127] [2021-06-12 19:57:54,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102667127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:54,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94853484] [2021-06-12 19:57:54,856 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 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 [2021-06-12 19:57:54,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:57:54,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:54,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:57:54,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:55,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94853484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:55,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:55,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:55,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224701635] [2021-06-12 19:57:55,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:55,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:55,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:55,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:55,133 INFO L87 Difference]: Start difference. First operand 215 states and 483 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) [2021-06-12 19:57:55,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:55,378 INFO L93 Difference]: Finished difference Result 255 states and 558 transitions. [2021-06-12 19:57:55,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:57:55,379 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 [2021-06-12 19:57:55,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:55,379 INFO L225 Difference]: With dead ends: 255 [2021-06-12 19:57:55,379 INFO L226 Difference]: Without dead ends: 252 [2021-06-12 19:57:55,379 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 376.3ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:57:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-12 19:57:55,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 216. [2021-06-12 19:57:55,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.26046511627907) internal successors, (486), 215 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:55,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 486 transitions. [2021-06-12 19:57:55,382 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 486 transitions. Word has length 19 [2021-06-12 19:57:55,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:55,382 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 486 transitions. [2021-06-12 19:57:55,382 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) [2021-06-12 19:57:55,382 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 486 transitions. [2021-06-12 19:57:55,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:55,382 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:55,382 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:55,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2306 [2021-06-12 19:57:55,597 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:55,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:55,597 INFO L82 PathProgramCache]: Analyzing trace with hash -652136798, now seen corresponding path program 294 times [2021-06-12 19:57:55,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:55,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15550200] [2021-06-12 19:57:55,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:55,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:55,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:55,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15550200] [2021-06-12 19:57:55,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15550200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:55,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825628025] [2021-06-12 19:57:55,737 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 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 [2021-06-12 19:57:55,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:57:55,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:55,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:55,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:56,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:56,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825628025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:56,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:56,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:56,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427888879] [2021-06-12 19:57:56,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:56,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:56,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:56,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:56,031 INFO L87 Difference]: Start difference. First operand 216 states and 486 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) [2021-06-12 19:57:56,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:56,691 INFO L93 Difference]: Finished difference Result 359 states and 741 transitions. [2021-06-12 19:57:56,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:57:56,692 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 [2021-06-12 19:57:56,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:56,692 INFO L225 Difference]: With dead ends: 359 [2021-06-12 19:57:56,692 INFO L226 Difference]: Without dead ends: 359 [2021-06-12 19:57:56,692 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 774.7ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:57:56,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-12 19:57:56,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 221. [2021-06-12 19:57:56,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2772727272727273) internal successors, (501), 220 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) [2021-06-12 19:57:56,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 501 transitions. [2021-06-12 19:57:56,694 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 501 transitions. Word has length 19 [2021-06-12 19:57:56,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:56,694 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 501 transitions. [2021-06-12 19:57:56,694 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) [2021-06-12 19:57:56,694 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 501 transitions. [2021-06-12 19:57:56,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:56,695 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:56,695 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:56,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2314,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:56,895 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:56,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:56,895 INFO L82 PathProgramCache]: Analyzing trace with hash -145790532, now seen corresponding path program 295 times [2021-06-12 19:57:56,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:56,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209318060] [2021-06-12 19:57:56,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:57,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:57,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:57,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209318060] [2021-06-12 19:57:57,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209318060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:57,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184594687] [2021-06-12 19:57:57,014 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 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 [2021-06-12 19:57:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:57,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:57,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:57,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:57,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184594687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:57,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:57,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:57,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563375409] [2021-06-12 19:57:57,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:57,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:57,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:57,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:57,220 INFO L87 Difference]: Start difference. First operand 221 states and 501 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) [2021-06-12 19:57:57,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:57,710 INFO L93 Difference]: Finished difference Result 310 states and 655 transitions. [2021-06-12 19:57:57,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:57:57,710 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 [2021-06-12 19:57:57,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:57,711 INFO L225 Difference]: With dead ends: 310 [2021-06-12 19:57:57,711 INFO L226 Difference]: Without dead ends: 310 [2021-06-12 19:57:57,711 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 547.9ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:57:57,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-06-12 19:57:57,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 220. [2021-06-12 19:57:57,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.269406392694064) internal successors, (497), 219 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) [2021-06-12 19:57:57,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 497 transitions. [2021-06-12 19:57:57,713 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 497 transitions. Word has length 19 [2021-06-12 19:57:57,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:57,713 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 497 transitions. [2021-06-12 19:57:57,713 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) [2021-06-12 19:57:57,713 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 497 transitions. [2021-06-12 19:57:57,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:57,713 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:57,713 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:57,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2322 [2021-06-12 19:57:57,914 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:57,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:57,914 INFO L82 PathProgramCache]: Analyzing trace with hash -683646110, now seen corresponding path program 296 times [2021-06-12 19:57:57,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:57,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360868036] [2021-06-12 19:57:57,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:57,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:58,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:58,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360868036] [2021-06-12 19:57:58,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360868036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:58,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615546375] [2021-06-12 19:57:58,038 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 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 [2021-06-12 19:57:58,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:58,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:58,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:58,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:58,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615546375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:58,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:58,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:58,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415812385] [2021-06-12 19:57:58,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:58,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:58,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:58,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:58,245 INFO L87 Difference]: Start difference. First operand 220 states and 497 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) [2021-06-12 19:57:58,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:58,540 INFO L93 Difference]: Finished difference Result 263 states and 578 transitions. [2021-06-12 19:57:58,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:57:58,540 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 [2021-06-12 19:57:58,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:58,540 INFO L225 Difference]: With dead ends: 263 [2021-06-12 19:57:58,541 INFO L226 Difference]: Without dead ends: 263 [2021-06-12 19:57:58,541 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 393.2ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:57:58,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-12 19:57:58,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 218. [2021-06-12 19:57:58,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2580645161290325) internal successors, (490), 217 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) [2021-06-12 19:57:58,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 490 transitions. [2021-06-12 19:57:58,543 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 490 transitions. Word has length 19 [2021-06-12 19:57:58,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:58,543 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 490 transitions. [2021-06-12 19:57:58,543 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) [2021-06-12 19:57:58,543 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 490 transitions. [2021-06-12 19:57:58,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:58,543 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:58,543 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:58,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2329 [2021-06-12 19:57:58,743 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:58,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:58,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1538645733, now seen corresponding path program 297 times [2021-06-12 19:57:58,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:58,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636749742] [2021-06-12 19:57:58,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:58,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:58,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636749742] [2021-06-12 19:57:58,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636749742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:58,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255809371] [2021-06-12 19:57:58,842 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 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 [2021-06-12 19:57:58,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:57:58,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:58,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:58,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:59,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255809371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:59,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:59,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:59,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180481848] [2021-06-12 19:57:59,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:59,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:59,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:59,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:59,134 INFO L87 Difference]: Start difference. First operand 218 states and 490 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) [2021-06-12 19:57:59,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:59,425 INFO L93 Difference]: Finished difference Result 258 states and 561 transitions. [2021-06-12 19:57:59,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:57:59,425 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 [2021-06-12 19:57:59,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:59,425 INFO L225 Difference]: With dead ends: 258 [2021-06-12 19:57:59,425 INFO L226 Difference]: Without dead ends: 258 [2021-06-12 19:57:59,425 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 460.6ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:59,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-06-12 19:57:59,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 221. [2021-06-12 19:57:59,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2636363636363637) internal successors, (498), 220 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) [2021-06-12 19:57:59,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 498 transitions. [2021-06-12 19:57:59,427 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 498 transitions. Word has length 19 [2021-06-12 19:57:59,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:59,427 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 498 transitions. [2021-06-12 19:57:59,428 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) [2021-06-12 19:57:59,428 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 498 transitions. [2021-06-12 19:57:59,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:57:59,428 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:59,428 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:59,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2334 [2021-06-12 19:57:59,629 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:59,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:59,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1826195968, now seen corresponding path program 298 times [2021-06-12 19:57:59,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:59,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746418980] [2021-06-12 19:57:59,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:59,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:59,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746418980] [2021-06-12 19:57:59,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746418980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:59,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624260519] [2021-06-12 19:57:59,731 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 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 [2021-06-12 19:57:59,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:59,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:59,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:57:59,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:59,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:59,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624260519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:59,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:59,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:57:59,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101373554] [2021-06-12 19:57:59,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:59,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:59,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:59,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:59,978 INFO L87 Difference]: Start difference. First operand 221 states and 498 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) [2021-06-12 19:58:00,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:00,528 INFO L93 Difference]: Finished difference Result 298 states and 631 transitions. [2021-06-12 19:58:00,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:58:00,528 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 [2021-06-12 19:58:00,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:00,528 INFO L225 Difference]: With dead ends: 298 [2021-06-12 19:58:00,528 INFO L226 Difference]: Without dead ends: 298 [2021-06-12 19:58:00,529 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 578.5ms TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:58:00,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-06-12 19:58:00,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 223. [2021-06-12 19:58:00,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.279279279279279) internal successors, (506), 222 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:00,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 506 transitions. [2021-06-12 19:58:00,531 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 506 transitions. Word has length 19 [2021-06-12 19:58:00,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:00,531 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 506 transitions. [2021-06-12 19:58:00,531 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) [2021-06-12 19:58:00,531 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 506 transitions. [2021-06-12 19:58:00,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:00,531 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:00,531 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:00,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2342 [2021-06-12 19:58:00,732 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:00,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:00,732 INFO L82 PathProgramCache]: Analyzing trace with hash -133839357, now seen corresponding path program 299 times [2021-06-12 19:58:00,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:00,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686671011] [2021-06-12 19:58:00,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:00,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:00,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:00,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686671011] [2021-06-12 19:58:00,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686671011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:00,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211143432] [2021-06-12 19:58:00,829 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 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 [2021-06-12 19:58:00,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:58:00,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:00,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:00,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:01,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:01,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211143432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:01,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:01,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:01,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233184796] [2021-06-12 19:58:01,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:01,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:01,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:01,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:01,124 INFO L87 Difference]: Start difference. First operand 223 states and 506 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) [2021-06-12 19:58:01,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:01,391 INFO L93 Difference]: Finished difference Result 249 states and 550 transitions. [2021-06-12 19:58:01,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:58:01,392 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 [2021-06-12 19:58:01,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:01,392 INFO L225 Difference]: With dead ends: 249 [2021-06-12 19:58:01,392 INFO L226 Difference]: Without dead ends: 240 [2021-06-12 19:58:01,392 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 452.4ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:58:01,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-12 19:58:01,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 223. [2021-06-12 19:58:01,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.27027027027027) internal successors, (504), 222 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:01,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 504 transitions. [2021-06-12 19:58:01,394 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 504 transitions. Word has length 19 [2021-06-12 19:58:01,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:01,394 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 504 transitions. [2021-06-12 19:58:01,394 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) [2021-06-12 19:58:01,394 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 504 transitions. [2021-06-12 19:58:01,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:01,394 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:01,394 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:01,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2349 [2021-06-12 19:58:01,595 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:01,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:01,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2128186248, now seen corresponding path program 300 times [2021-06-12 19:58:01,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:01,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716011105] [2021-06-12 19:58:01,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:01,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:01,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:01,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716011105] [2021-06-12 19:58:01,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716011105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:01,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739795636] [2021-06-12 19:58:01,694 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 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 [2021-06-12 19:58:01,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:58:01,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:01,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:01,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:01,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:01,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739795636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:01,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:01,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:01,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659280570] [2021-06-12 19:58:01,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:01,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:01,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:01,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:01,915 INFO L87 Difference]: Start difference. First operand 223 states and 504 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) [2021-06-12 19:58:02,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:02,263 INFO L93 Difference]: Finished difference Result 255 states and 564 transitions. [2021-06-12 19:58:02,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:58:02,263 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 [2021-06-12 19:58:02,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:02,264 INFO L225 Difference]: With dead ends: 255 [2021-06-12 19:58:02,264 INFO L226 Difference]: Without dead ends: 255 [2021-06-12 19:58:02,264 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 453.3ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:58:02,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-12 19:58:02,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 222. [2021-06-12 19:58:02,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.271493212669683) internal successors, (502), 221 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:02,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 502 transitions. [2021-06-12 19:58:02,266 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 502 transitions. Word has length 19 [2021-06-12 19:58:02,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:02,266 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 502 transitions. [2021-06-12 19:58:02,266 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) [2021-06-12 19:58:02,266 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 502 transitions. [2021-06-12 19:58:02,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:02,266 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:02,266 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:02,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2357,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:02,467 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:02,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:02,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1660434782, now seen corresponding path program 301 times [2021-06-12 19:58:02,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:02,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075238882] [2021-06-12 19:58:02,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:02,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:02,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075238882] [2021-06-12 19:58:02,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075238882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:02,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219675085] [2021-06-12 19:58:02,569 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 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 [2021-06-12 19:58:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:02,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:02,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:02,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219675085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:02,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:02,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:02,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596945122] [2021-06-12 19:58:02,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:02,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:02,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:02,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:02,776 INFO L87 Difference]: Start difference. First operand 222 states and 502 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) [2021-06-12 19:58:02,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:02,901 INFO L93 Difference]: Finished difference Result 249 states and 550 transitions. [2021-06-12 19:58:02,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:58:02,902 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 [2021-06-12 19:58:02,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:02,902 INFO L225 Difference]: With dead ends: 249 [2021-06-12 19:58:02,902 INFO L226 Difference]: Without dead ends: 249 [2021-06-12 19:58:02,902 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:02,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-12 19:58:02,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 219. [2021-06-12 19:58:02,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.256880733944954) internal successors, (492), 218 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:02,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 492 transitions. [2021-06-12 19:58:02,904 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 492 transitions. Word has length 19 [2021-06-12 19:58:02,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:02,904 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 492 transitions. [2021-06-12 19:58:02,904 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) [2021-06-12 19:58:02,904 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 492 transitions. [2021-06-12 19:58:02,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:02,904 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:02,904 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:03,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2362,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:03,105 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:03,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:03,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1443064199, now seen corresponding path program 302 times [2021-06-12 19:58:03,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:03,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28888852] [2021-06-12 19:58:03,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:03,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:03,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28888852] [2021-06-12 19:58:03,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28888852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:03,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080990471] [2021-06-12 19:58:03,209 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 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 [2021-06-12 19:58:03,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:03,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:03,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:58:03,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:03,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080990471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:03,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:03,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:58:03,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789773968] [2021-06-12 19:58:03,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:58:03,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:03,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:58:03,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:58:03,462 INFO L87 Difference]: Start difference. First operand 219 states and 492 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) [2021-06-12 19:58:03,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:03,794 INFO L93 Difference]: Finished difference Result 238 states and 530 transitions. [2021-06-12 19:58:03,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:58:03,794 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 [2021-06-12 19:58:03,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:03,795 INFO L225 Difference]: With dead ends: 238 [2021-06-12 19:58:03,795 INFO L226 Difference]: Without dead ends: 238 [2021-06-12 19:58:03,795 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 477.0ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:58:03,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-12 19:58:03,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 219. [2021-06-12 19:58:03,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.256880733944954) internal successors, (492), 218 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:03,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 492 transitions. [2021-06-12 19:58:03,797 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 492 transitions. Word has length 19 [2021-06-12 19:58:03,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:03,797 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 492 transitions. [2021-06-12 19:58:03,797 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) [2021-06-12 19:58:03,797 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 492 transitions. [2021-06-12 19:58:03,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:03,797 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:03,797 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:03,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2367,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:03,998 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:03,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:03,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1693024113, now seen corresponding path program 303 times [2021-06-12 19:58:03,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:03,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327881601] [2021-06-12 19:58:03,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:04,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:04,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327881601] [2021-06-12 19:58:04,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327881601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:04,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256444026] [2021-06-12 19:58:04,092 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 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 [2021-06-12 19:58:04,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:58:04,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:04,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:04,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:04,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256444026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:04,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:04,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:58:04,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240644189] [2021-06-12 19:58:04,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:58:04,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:04,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:58:04,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:58:04,314 INFO L87 Difference]: Start difference. First operand 219 states and 492 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) [2021-06-12 19:58:04,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:04,810 INFO L93 Difference]: Finished difference Result 250 states and 554 transitions. [2021-06-12 19:58:04,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:58:04,810 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 [2021-06-12 19:58:04,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:04,810 INFO L225 Difference]: With dead ends: 250 [2021-06-12 19:58:04,810 INFO L226 Difference]: Without dead ends: 250 [2021-06-12 19:58:04,811 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 560.0ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:58:04,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-06-12 19:58:04,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 219. [2021-06-12 19:58:04,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.256880733944954) internal successors, (492), 218 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:04,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 492 transitions. [2021-06-12 19:58:04,812 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 492 transitions. Word has length 19 [2021-06-12 19:58:04,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:04,813 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 492 transitions. [2021-06-12 19:58:04,813 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) [2021-06-12 19:58:04,813 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 492 transitions. [2021-06-12 19:58:04,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:04,813 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:04,813 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:05,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2371,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:05,013 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:05,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:05,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1530947719, now seen corresponding path program 304 times [2021-06-12 19:58:05,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:05,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463125863] [2021-06-12 19:58:05,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:05,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:05,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:05,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463125863] [2021-06-12 19:58:05,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463125863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:05,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549402112] [2021-06-12 19:58:05,110 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 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 [2021-06-12 19:58:05,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:05,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:05,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:05,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:05,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549402112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:05,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:05,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:58:05,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523629299] [2021-06-12 19:58:05,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:58:05,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:05,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:58:05,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:58:05,341 INFO L87 Difference]: Start difference. First operand 219 states and 492 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) [2021-06-12 19:58:05,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:05,896 INFO L93 Difference]: Finished difference Result 255 states and 563 transitions. [2021-06-12 19:58:05,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:58:05,897 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 [2021-06-12 19:58:05,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:05,897 INFO L225 Difference]: With dead ends: 255 [2021-06-12 19:58:05,897 INFO L226 Difference]: Without dead ends: 255 [2021-06-12 19:58:05,897 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 607.5ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:58:05,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-12 19:58:05,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 219. [2021-06-12 19:58:05,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.256880733944954) internal successors, (492), 218 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:05,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 492 transitions. [2021-06-12 19:58:05,899 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 492 transitions. Word has length 19 [2021-06-12 19:58:05,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:05,899 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 492 transitions. [2021-06-12 19:58:05,899 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) [2021-06-12 19:58:05,899 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 492 transitions. [2021-06-12 19:58:05,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:05,899 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:05,900 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:06,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2376 [2021-06-12 19:58:06,113 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:06,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:06,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1967283825, now seen corresponding path program 305 times [2021-06-12 19:58:06,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:06,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696913661] [2021-06-12 19:58:06,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:06,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:06,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696913661] [2021-06-12 19:58:06,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696913661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:06,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908625260] [2021-06-12 19:58:06,216 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 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 [2021-06-12 19:58:06,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:58:06,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:06,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:06,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:06,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908625260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:06,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:06,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:58:06,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843690748] [2021-06-12 19:58:06,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:58:06,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:06,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:58:06,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:58:06,446 INFO L87 Difference]: Start difference. First operand 219 states and 492 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) [2021-06-12 19:58:07,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:07,258 INFO L93 Difference]: Finished difference Result 289 states and 617 transitions. [2021-06-12 19:58:07,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:58:07,258 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 [2021-06-12 19:58:07,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:07,258 INFO L225 Difference]: With dead ends: 289 [2021-06-12 19:58:07,258 INFO L226 Difference]: Without dead ends: 289 [2021-06-12 19:58:07,258 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 891.5ms TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:58:07,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-06-12 19:58:07,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 220. [2021-06-12 19:58:07,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.2648401826484017) internal successors, (496), 219 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) [2021-06-12 19:58:07,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 496 transitions. [2021-06-12 19:58:07,261 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 496 transitions. Word has length 19 [2021-06-12 19:58:07,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:07,261 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 496 transitions. [2021-06-12 19:58:07,262 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) [2021-06-12 19:58:07,262 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 496 transitions. [2021-06-12 19:58:07,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:07,262 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:07,262 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:07,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2381,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:07,477 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:07,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:07,477 INFO L82 PathProgramCache]: Analyzing trace with hash -839887732, now seen corresponding path program 306 times [2021-06-12 19:58:07,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:07,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072145803] [2021-06-12 19:58:07,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:07,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:07,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072145803] [2021-06-12 19:58:07,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072145803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:07,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739963800] [2021-06-12 19:58:07,571 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 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 [2021-06-12 19:58:07,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:58:07,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:07,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:07,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:07,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:07,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739963800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:07,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:07,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:58:07,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623925287] [2021-06-12 19:58:07,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:58:07,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:07,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:58:07,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:58:07,849 INFO L87 Difference]: Start difference. First operand 220 states and 496 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) [2021-06-12 19:58:08,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:08,166 INFO L93 Difference]: Finished difference Result 246 states and 545 transitions. [2021-06-12 19:58:08,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:58:08,166 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 [2021-06-12 19:58:08,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:08,166 INFO L225 Difference]: With dead ends: 246 [2021-06-12 19:58:08,167 INFO L226 Difference]: Without dead ends: 244 [2021-06-12 19:58:08,167 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 446.0ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:58:08,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-12 19:58:08,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 220. [2021-06-12 19:58:08,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:08,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-06-12 19:58:08,169 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-06-12 19:58:08,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:08,169 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-06-12 19:58:08,169 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) [2021-06-12 19:58:08,169 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-06-12 19:58:08,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:08,169 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:08,169 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:08,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2388 [2021-06-12 19:58:08,369 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:08,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:08,370 INFO L82 PathProgramCache]: Analyzing trace with hash -425566935, now seen corresponding path program 307 times [2021-06-12 19:58:08,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:08,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689974499] [2021-06-12 19:58:08,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:08,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:08,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689974499] [2021-06-12 19:58:08,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689974499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:08,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510312845] [2021-06-12 19:58:08,478 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 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 [2021-06-12 19:58:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:08,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:08,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:08,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510312845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:08,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:08,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:08,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782674878] [2021-06-12 19:58:08,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:08,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:08,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:08,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:08,686 INFO L87 Difference]: Start difference. First operand 220 states and 495 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) [2021-06-12 19:58:08,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:08,908 INFO L93 Difference]: Finished difference Result 242 states and 539 transitions. [2021-06-12 19:58:08,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:58:08,908 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 [2021-06-12 19:58:08,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:08,909 INFO L225 Difference]: With dead ends: 242 [2021-06-12 19:58:08,909 INFO L226 Difference]: Without dead ends: 242 [2021-06-12 19:58:08,909 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 259.6ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:58:08,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-12 19:58:08,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 220. [2021-06-12 19:58:08,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:08,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-06-12 19:58:08,911 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-06-12 19:58:08,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:08,911 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-06-12 19:58:08,911 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) [2021-06-12 19:58:08,911 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-06-12 19:58:08,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:08,911 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:08,911 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:09,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:09,111 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:09,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:09,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1496562399, now seen corresponding path program 308 times [2021-06-12 19:58:09,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:09,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918079071] [2021-06-12 19:58:09,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:09,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:09,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:09,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:09,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918079071] [2021-06-12 19:58:09,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918079071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:09,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638275575] [2021-06-12 19:58:09,212 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 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 [2021-06-12 19:58:09,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:09,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:09,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:09,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:09,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:09,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638275575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:09,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:09,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:09,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077152569] [2021-06-12 19:58:09,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:09,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:09,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:09,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:09,418 INFO L87 Difference]: Start difference. First operand 220 states and 495 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) [2021-06-12 19:58:09,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:09,869 INFO L93 Difference]: Finished difference Result 256 states and 566 transitions. [2021-06-12 19:58:09,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:58:09,870 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 [2021-06-12 19:58:09,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:09,870 INFO L225 Difference]: With dead ends: 256 [2021-06-12 19:58:09,870 INFO L226 Difference]: Without dead ends: 256 [2021-06-12 19:58:09,870 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 522.3ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:58:09,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-12 19:58:09,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 220. [2021-06-12 19:58:09,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:09,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-06-12 19:58:09,872 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-06-12 19:58:09,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:09,872 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-06-12 19:58:09,872 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) [2021-06-12 19:58:09,872 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-06-12 19:58:09,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:09,872 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:09,872 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:10,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2401 [2021-06-12 19:58:10,073 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:10,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:10,073 INFO L82 PathProgramCache]: Analyzing trace with hash 670319846, now seen corresponding path program 309 times [2021-06-12 19:58:10,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:10,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864939667] [2021-06-12 19:58:10,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:10,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:10,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864939667] [2021-06-12 19:58:10,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864939667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:10,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99383065] [2021-06-12 19:58:10,168 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 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 [2021-06-12 19:58:10,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:58:10,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:10,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:10,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:10,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99383065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:10,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:10,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:10,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828945080] [2021-06-12 19:58:10,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:10,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:10,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:10,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:10,422 INFO L87 Difference]: Start difference. First operand 220 states and 495 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) [2021-06-12 19:58:10,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:10,749 INFO L93 Difference]: Finished difference Result 272 states and 582 transitions. [2021-06-12 19:58:10,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:58:10,749 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 [2021-06-12 19:58:10,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:10,749 INFO L225 Difference]: With dead ends: 272 [2021-06-12 19:58:10,749 INFO L226 Difference]: Without dead ends: 264 [2021-06-12 19:58:10,749 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 469.8ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:58:10,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-12 19:58:10,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 224. [2021-06-12 19:58:10,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2690582959641254) internal successors, (506), 223 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:10,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 506 transitions. [2021-06-12 19:58:10,751 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 506 transitions. Word has length 19 [2021-06-12 19:58:10,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:10,751 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 506 transitions. [2021-06-12 19:58:10,751 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) [2021-06-12 19:58:10,751 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 506 transitions. [2021-06-12 19:58:10,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:10,752 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:10,752 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:10,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2406,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:10,952 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:10,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:10,952 INFO L82 PathProgramCache]: Analyzing trace with hash -699826647, now seen corresponding path program 310 times [2021-06-12 19:58:10,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:10,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361199048] [2021-06-12 19:58:10,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:11,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:11,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361199048] [2021-06-12 19:58:11,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361199048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:11,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81638728] [2021-06-12 19:58:11,048 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 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 [2021-06-12 19:58:11,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:11,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:11,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:11,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:11,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81638728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:11,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:11,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:11,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762783596] [2021-06-12 19:58:11,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:11,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:11,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:11,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:11,267 INFO L87 Difference]: Start difference. First operand 224 states and 506 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) [2021-06-12 19:58:11,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:11,767 INFO L93 Difference]: Finished difference Result 265 states and 584 transitions. [2021-06-12 19:58:11,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:58:11,767 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 [2021-06-12 19:58:11,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:11,768 INFO L225 Difference]: With dead ends: 265 [2021-06-12 19:58:11,768 INFO L226 Difference]: Without dead ends: 262 [2021-06-12 19:58:11,768 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 570.5ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:58:11,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-12 19:58:11,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 224. [2021-06-12 19:58:11,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2645739910313902) internal successors, (505), 223 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) [2021-06-12 19:58:11,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 505 transitions. [2021-06-12 19:58:11,770 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 505 transitions. Word has length 19 [2021-06-12 19:58:11,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:11,770 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 505 transitions. [2021-06-12 19:58:11,770 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) [2021-06-12 19:58:11,770 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 505 transitions. [2021-06-12 19:58:11,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:11,770 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:11,770 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:11,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2413,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:11,971 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:11,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:11,971 INFO L82 PathProgramCache]: Analyzing trace with hash 427569446, now seen corresponding path program 311 times [2021-06-12 19:58:11,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:11,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676048754] [2021-06-12 19:58:11,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:12,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:12,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:12,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676048754] [2021-06-12 19:58:12,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676048754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:12,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261870930] [2021-06-12 19:58:12,072 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 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 [2021-06-12 19:58:12,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:58:12,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:12,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:58:12,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:12,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:12,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261870930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:12,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:12,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:12,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952603970] [2021-06-12 19:58:12,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:12,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:12,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:12,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:12,322 INFO L87 Difference]: Start difference. First operand 224 states and 505 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) [2021-06-12 19:58:12,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:12,549 INFO L93 Difference]: Finished difference Result 242 states and 539 transitions. [2021-06-12 19:58:12,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:58:12,549 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 [2021-06-12 19:58:12,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:12,549 INFO L225 Difference]: With dead ends: 242 [2021-06-12 19:58:12,549 INFO L226 Difference]: Without dead ends: 242 [2021-06-12 19:58:12,549 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 371.7ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:12,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-12 19:58:12,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 218. [2021-06-12 19:58:12,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2580645161290325) internal successors, (490), 217 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) [2021-06-12 19:58:12,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 490 transitions. [2021-06-12 19:58:12,551 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 490 transitions. Word has length 19 [2021-06-12 19:58:12,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:12,551 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 490 transitions. [2021-06-12 19:58:12,551 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) [2021-06-12 19:58:12,551 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 490 transitions. [2021-06-12 19:58:12,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:12,552 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:12,552 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:12,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2420 [2021-06-12 19:58:12,752 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:12,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:12,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1315269959, now seen corresponding path program 312 times [2021-06-12 19:58:12,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:12,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437487314] [2021-06-12 19:58:12,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:12,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:12,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437487314] [2021-06-12 19:58:12,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437487314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:12,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653001522] [2021-06-12 19:58:12,878 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 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 [2021-06-12 19:58:12,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:58:12,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:12,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:12,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:13,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:13,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653001522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:13,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:13,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:13,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843551800] [2021-06-12 19:58:13,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:13,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:13,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:13,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:13,081 INFO L87 Difference]: Start difference. First operand 218 states and 490 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) [2021-06-12 19:58:13,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:13,269 INFO L93 Difference]: Finished difference Result 243 states and 540 transitions. [2021-06-12 19:58:13,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:58:13,270 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 [2021-06-12 19:58:13,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:13,270 INFO L225 Difference]: With dead ends: 243 [2021-06-12 19:58:13,270 INFO L226 Difference]: Without dead ends: 243 [2021-06-12 19:58:13,270 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 326.1ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:13,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-06-12 19:58:13,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 218. [2021-06-12 19:58:13,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2580645161290325) internal successors, (490), 217 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) [2021-06-12 19:58:13,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 490 transitions. [2021-06-12 19:58:13,272 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 490 transitions. Word has length 19 [2021-06-12 19:58:13,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:13,272 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 490 transitions. [2021-06-12 19:58:13,272 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) [2021-06-12 19:58:13,272 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 490 transitions. [2021-06-12 19:58:13,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:13,273 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:13,273 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:13,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2428,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:13,473 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:13,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:13,473 INFO L82 PathProgramCache]: Analyzing trace with hash 2112005711, now seen corresponding path program 313 times [2021-06-12 19:58:13,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:13,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215866397] [2021-06-12 19:58:13,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:13,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:13,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215866397] [2021-06-12 19:58:13,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215866397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:13,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920128757] [2021-06-12 19:58:13,593 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 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 [2021-06-12 19:58:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:13,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:13,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:13,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920128757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:13,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:13,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:13,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126385060] [2021-06-12 19:58:13,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:13,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:13,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:13,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:13,791 INFO L87 Difference]: Start difference. First operand 218 states and 490 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) [2021-06-12 19:58:14,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:14,109 INFO L93 Difference]: Finished difference Result 249 states and 552 transitions. [2021-06-12 19:58:14,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:58:14,109 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 [2021-06-12 19:58:14,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:14,109 INFO L225 Difference]: With dead ends: 249 [2021-06-12 19:58:14,109 INFO L226 Difference]: Without dead ends: 249 [2021-06-12 19:58:14,110 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 383.9ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:58:14,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-12 19:58:14,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 218. [2021-06-12 19:58:14,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2580645161290325) internal successors, (490), 217 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) [2021-06-12 19:58:14,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 490 transitions. [2021-06-12 19:58:14,111 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 490 transitions. Word has length 19 [2021-06-12 19:58:14,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:14,111 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 490 transitions. [2021-06-12 19:58:14,112 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) [2021-06-12 19:58:14,112 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 490 transitions. [2021-06-12 19:58:14,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:14,112 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:14,112 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:14,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2433 [2021-06-12 19:58:14,312 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:14,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:14,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1895411350, now seen corresponding path program 314 times [2021-06-12 19:58:14,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:14,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269687349] [2021-06-12 19:58:14,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:14,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:14,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269687349] [2021-06-12 19:58:14,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269687349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:14,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986054713] [2021-06-12 19:58:14,438 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 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 [2021-06-12 19:58:14,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:14,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:14,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:14,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:14,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986054713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:14,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:14,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:14,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956157377] [2021-06-12 19:58:14,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:14,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:14,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:14,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:14,676 INFO L87 Difference]: Start difference. First operand 218 states and 490 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) [2021-06-12 19:58:14,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:14,865 INFO L93 Difference]: Finished difference Result 238 states and 530 transitions. [2021-06-12 19:58:14,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:58:14,865 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 [2021-06-12 19:58:14,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:14,866 INFO L225 Difference]: With dead ends: 238 [2021-06-12 19:58:14,866 INFO L226 Difference]: Without dead ends: 238 [2021-06-12 19:58:14,866 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 343.4ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:58:14,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-12 19:58:14,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 215. [2021-06-12 19:58:14,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 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) [2021-06-12 19:58:14,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-06-12 19:58:14,868 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-06-12 19:58:14,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:14,868 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-06-12 19:58:14,868 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) [2021-06-12 19:58:14,868 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-06-12 19:58:14,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:14,868 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:14,868 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:15,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2440,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:15,068 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:15,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:15,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1676615319, now seen corresponding path program 315 times [2021-06-12 19:58:15,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:15,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703133949] [2021-06-12 19:58:15,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:15,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:15,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:15,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703133949] [2021-06-12 19:58:15,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703133949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:15,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193883] [2021-06-12 19:58:15,192 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 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 [2021-06-12 19:58:15,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:58:15,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:15,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:15,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:15,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:15,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:15,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:15,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171555178] [2021-06-12 19:58:15,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:15,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:15,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:15,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:15,452 INFO L87 Difference]: Start difference. First operand 215 states and 483 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) [2021-06-12 19:58:15,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:15,741 INFO L93 Difference]: Finished difference Result 249 states and 541 transitions. [2021-06-12 19:58:15,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:58:15,741 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 [2021-06-12 19:58:15,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:15,741 INFO L225 Difference]: With dead ends: 249 [2021-06-12 19:58:15,741 INFO L226 Difference]: Without dead ends: 249 [2021-06-12 19:58:15,741 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 443.5ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:58:15,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-12 19:58:15,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 226. [2021-06-12 19:58:15,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.2355555555555555) internal successors, (503), 225 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:15,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 503 transitions. [2021-06-12 19:58:15,743 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 503 transitions. Word has length 19 [2021-06-12 19:58:15,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:15,744 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 503 transitions. [2021-06-12 19:58:15,744 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) [2021-06-12 19:58:15,744 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 503 transitions. [2021-06-12 19:58:15,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:15,744 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:15,744 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:15,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2448,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:15,944 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:15,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:15,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1389065084, now seen corresponding path program 316 times [2021-06-12 19:58:15,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:15,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011352529] [2021-06-12 19:58:15,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:16,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:16,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011352529] [2021-06-12 19:58:16,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011352529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:16,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677777537] [2021-06-12 19:58:16,061 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 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 [2021-06-12 19:58:16,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:16,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:16,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:16,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:16,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:16,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677777537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:16,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:16,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:16,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655726244] [2021-06-12 19:58:16,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:16,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:16,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:16,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:16,258 INFO L87 Difference]: Start difference. First operand 226 states and 503 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) [2021-06-12 19:58:16,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:16,568 INFO L93 Difference]: Finished difference Result 311 states and 659 transitions. [2021-06-12 19:58:16,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:58:16,568 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 [2021-06-12 19:58:16,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:16,568 INFO L225 Difference]: With dead ends: 311 [2021-06-12 19:58:16,568 INFO L226 Difference]: Without dead ends: 311 [2021-06-12 19:58:16,569 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 354.6ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:58:16,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-12 19:58:16,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 227. [2021-06-12 19:58:16,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.247787610619469) internal successors, (508), 226 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:16,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 508 transitions. [2021-06-12 19:58:16,571 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 508 transitions. Word has length 19 [2021-06-12 19:58:16,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:16,571 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 508 transitions. [2021-06-12 19:58:16,571 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) [2021-06-12 19:58:16,571 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 508 transitions. [2021-06-12 19:58:16,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:16,571 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:16,571 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:16,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2456 [2021-06-12 19:58:16,771 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:16,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:16,772 INFO L82 PathProgramCache]: Analyzing trace with hash 945866887, now seen corresponding path program 317 times [2021-06-12 19:58:16,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:16,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095994670] [2021-06-12 19:58:16,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:16,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:16,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095994670] [2021-06-12 19:58:16,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095994670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:16,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384297505] [2021-06-12 19:58:16,893 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 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 [2021-06-12 19:58:16,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:58:16,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:16,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:16,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:17,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384297505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:17,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:17,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:17,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691569839] [2021-06-12 19:58:17,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:17,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:17,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:17,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:17,166 INFO L87 Difference]: Start difference. First operand 227 states and 508 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) [2021-06-12 19:58:17,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:17,375 INFO L93 Difference]: Finished difference Result 236 states and 524 transitions. [2021-06-12 19:58:17,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:58:17,375 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 [2021-06-12 19:58:17,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:17,375 INFO L225 Difference]: With dead ends: 236 [2021-06-12 19:58:17,375 INFO L226 Difference]: Without dead ends: 230 [2021-06-12 19:58:17,375 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 359.8ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:17,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-12 19:58:17,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 218. [2021-06-12 19:58:17,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2672811059907834) internal successors, (492), 217 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:17,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 492 transitions. [2021-06-12 19:58:17,377 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 492 transitions. Word has length 19 [2021-06-12 19:58:17,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:17,377 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 492 transitions. [2021-06-12 19:58:17,377 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) [2021-06-12 19:58:17,377 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 492 transitions. [2021-06-12 19:58:17,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:17,378 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:17,378 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:17,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2463 [2021-06-12 19:58:17,578 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:17,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:17,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1087074804, now seen corresponding path program 318 times [2021-06-12 19:58:17,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:17,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647517945] [2021-06-12 19:58:17,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:17,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:17,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647517945] [2021-06-12 19:58:17,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647517945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:17,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960056616] [2021-06-12 19:58:17,700 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 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 [2021-06-12 19:58:17,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:58:17,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:17,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:17,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:17,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960056616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:17,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:17,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:17,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502016368] [2021-06-12 19:58:17,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:17,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:17,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:17,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:17,902 INFO L87 Difference]: Start difference. First operand 218 states and 492 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) [2021-06-12 19:58:18,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:18,067 INFO L93 Difference]: Finished difference Result 252 states and 558 transitions. [2021-06-12 19:58:18,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:58:18,067 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 [2021-06-12 19:58:18,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:18,068 INFO L225 Difference]: With dead ends: 252 [2021-06-12 19:58:18,068 INFO L226 Difference]: Without dead ends: 252 [2021-06-12 19:58:18,068 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 279.5ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:58:18,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-12 19:58:18,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 213. [2021-06-12 19:58:18,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.259433962264151) internal successors, (479), 212 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) [2021-06-12 19:58:18,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 479 transitions. [2021-06-12 19:58:18,070 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 479 transitions. Word has length 19 [2021-06-12 19:58:18,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:18,070 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 479 transitions. [2021-06-12 19:58:18,070 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) [2021-06-12 19:58:18,070 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 479 transitions. [2021-06-12 19:58:18,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:18,070 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:18,070 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:18,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2471 [2021-06-12 19:58:18,271 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:18,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:18,271 INFO L82 PathProgramCache]: Analyzing trace with hash 210899919, now seen corresponding path program 319 times [2021-06-12 19:58:18,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:18,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380771031] [2021-06-12 19:58:18,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:18,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:18,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:18,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:18,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380771031] [2021-06-12 19:58:18,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380771031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:18,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011952039] [2021-06-12 19:58:18,370 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 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 [2021-06-12 19:58:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:18,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:58:18,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:18,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011952039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:18,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:18,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:18,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428045435] [2021-06-12 19:58:18,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:18,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:18,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:18,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:18,672 INFO L87 Difference]: Start difference. First operand 213 states and 479 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) [2021-06-12 19:58:18,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:18,880 INFO L93 Difference]: Finished difference Result 236 states and 525 transitions. [2021-06-12 19:58:18,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:58:18,880 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 [2021-06-12 19:58:18,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:18,881 INFO L225 Difference]: With dead ends: 236 [2021-06-12 19:58:18,881 INFO L226 Difference]: Without dead ends: 236 [2021-06-12 19:58:18,881 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 313.3ms TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:18,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-12 19:58:18,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 214. [2021-06-12 19:58:18,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2582159624413145) internal successors, (481), 213 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:18,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 481 transitions. [2021-06-12 19:58:18,883 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 481 transitions. Word has length 19 [2021-06-12 19:58:18,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:18,883 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 481 transitions. [2021-06-12 19:58:18,883 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) [2021-06-12 19:58:18,883 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 481 transitions. [2021-06-12 19:58:18,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:18,883 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:18,883 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:19,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2476 [2021-06-12 19:58:19,084 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:19,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:19,084 INFO L82 PathProgramCache]: Analyzing trace with hash -860095545, now seen corresponding path program 320 times [2021-06-12 19:58:19,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:19,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015554195] [2021-06-12 19:58:19,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:19,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:19,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:19,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015554195] [2021-06-12 19:58:19,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015554195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:19,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845961913] [2021-06-12 19:58:19,186 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 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 [2021-06-12 19:58:19,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:19,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:19,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:19,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:19,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845961913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:19,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:19,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:19,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393973844] [2021-06-12 19:58:19,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:19,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:19,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:19,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:19,404 INFO L87 Difference]: Start difference. First operand 214 states and 481 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) [2021-06-12 19:58:19,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:19,821 INFO L93 Difference]: Finished difference Result 252 states and 557 transitions. [2021-06-12 19:58:19,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:58:19,821 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 [2021-06-12 19:58:19,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:19,822 INFO L225 Difference]: With dead ends: 252 [2021-06-12 19:58:19,822 INFO L226 Difference]: Without dead ends: 252 [2021-06-12 19:58:19,822 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 463.6ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:58:19,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-12 19:58:19,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 215. [2021-06-12 19:58:19,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 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) [2021-06-12 19:58:19,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-06-12 19:58:19,824 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-06-12 19:58:19,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:19,824 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-06-12 19:58:19,824 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) [2021-06-12 19:58:19,824 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-06-12 19:58:19,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:19,824 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:19,824 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:20,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2480,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:20,025 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:20,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:20,025 INFO L82 PathProgramCache]: Analyzing trace with hash -63359793, now seen corresponding path program 321 times [2021-06-12 19:58:20,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:20,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071845315] [2021-06-12 19:58:20,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:20,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:20,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:20,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071845315] [2021-06-12 19:58:20,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071845315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:20,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444321208] [2021-06-12 19:58:20,124 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 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 [2021-06-12 19:58:20,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:58:20,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:20,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:20,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:20,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444321208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:20,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:20,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:20,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026809307] [2021-06-12 19:58:20,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:20,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:20,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:20,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:20,343 INFO L87 Difference]: Start difference. First operand 215 states and 483 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) [2021-06-12 19:58:20,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:20,843 INFO L93 Difference]: Finished difference Result 263 states and 576 transitions. [2021-06-12 19:58:20,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:58:20,843 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 [2021-06-12 19:58:20,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:20,843 INFO L225 Difference]: With dead ends: 263 [2021-06-12 19:58:20,844 INFO L226 Difference]: Without dead ends: 260 [2021-06-12 19:58:20,844 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 553.8ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:58:20,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-12 19:58:20,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 216. [2021-06-12 19:58:20,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.26046511627907) internal successors, (486), 215 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:20,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 486 transitions. [2021-06-12 19:58:20,846 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 486 transitions. Word has length 19 [2021-06-12 19:58:20,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:20,846 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 486 transitions. [2021-06-12 19:58:20,846 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) [2021-06-12 19:58:20,846 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 486 transitions. [2021-06-12 19:58:20,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:20,846 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:20,846 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:21,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2485 [2021-06-12 19:58:21,046 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:21,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:21,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1064036300, now seen corresponding path program 322 times [2021-06-12 19:58:21,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:21,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117207599] [2021-06-12 19:58:21,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:21,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:21,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:21,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:21,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117207599] [2021-06-12 19:58:21,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117207599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:21,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942795965] [2021-06-12 19:58:21,147 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 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 [2021-06-12 19:58:21,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:21,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:21,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:21,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:21,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942795965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:21,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:21,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:21,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448630973] [2021-06-12 19:58:21,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:21,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:21,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:21,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:21,400 INFO L87 Difference]: Start difference. First operand 216 states and 486 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) [2021-06-12 19:58:21,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:21,817 INFO L93 Difference]: Finished difference Result 265 states and 576 transitions. [2021-06-12 19:58:21,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:58:21,817 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 [2021-06-12 19:58:21,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:21,818 INFO L225 Difference]: With dead ends: 265 [2021-06-12 19:58:21,818 INFO L226 Difference]: Without dead ends: 265 [2021-06-12 19:58:21,818 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 523.3ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:58:21,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-12 19:58:21,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 214. [2021-06-12 19:58:21,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2582159624413145) internal successors, (481), 213 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:21,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 481 transitions. [2021-06-12 19:58:21,820 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 481 transitions. Word has length 19 [2021-06-12 19:58:21,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:21,820 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 481 transitions. [2021-06-12 19:58:21,820 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) [2021-06-12 19:58:21,820 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 481 transitions. [2021-06-12 19:58:21,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:21,820 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:21,820 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:22,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2492,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:22,021 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:22,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:22,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1951736813, now seen corresponding path program 323 times [2021-06-12 19:58:22,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:22,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411214622] [2021-06-12 19:58:22,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:22,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:22,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411214622] [2021-06-12 19:58:22,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411214622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:22,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679213261] [2021-06-12 19:58:22,145 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 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 [2021-06-12 19:58:22,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:58:22,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:22,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:22,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:22,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679213261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:22,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:22,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:22,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419995232] [2021-06-12 19:58:22,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:22,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:22,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:22,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:22,352 INFO L87 Difference]: Start difference. First operand 214 states and 481 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) [2021-06-12 19:58:22,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:22,591 INFO L93 Difference]: Finished difference Result 239 states and 531 transitions. [2021-06-12 19:58:22,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:58:22,592 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 [2021-06-12 19:58:22,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:22,592 INFO L225 Difference]: With dead ends: 239 [2021-06-12 19:58:22,592 INFO L226 Difference]: Without dead ends: 239 [2021-06-12 19:58:22,592 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 322.0ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:58:22,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-06-12 19:58:22,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 214. [2021-06-12 19:58:22,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2582159624413145) internal successors, (481), 213 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:22,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 481 transitions. [2021-06-12 19:58:22,594 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 481 transitions. Word has length 19 [2021-06-12 19:58:22,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:22,594 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 481 transitions. [2021-06-12 19:58:22,594 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) [2021-06-12 19:58:22,594 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 481 transitions. [2021-06-12 19:58:22,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:22,594 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:22,594 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:22,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2500 [2021-06-12 19:58:22,795 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:22,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:22,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1546494731, now seen corresponding path program 324 times [2021-06-12 19:58:22,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:22,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026592868] [2021-06-12 19:58:22,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:22,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:22,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026592868] [2021-06-12 19:58:22,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026592868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:22,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149913235] [2021-06-12 19:58:22,914 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 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 [2021-06-12 19:58:22,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:58:22,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:22,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 19:58:22,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:23,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149913235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:23,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:23,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:58:23,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801370611] [2021-06-12 19:58:23,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:58:23,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:23,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:58:23,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:58:23,133 INFO L87 Difference]: Start difference. First operand 214 states and 481 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) [2021-06-12 19:58:23,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:23,430 INFO L93 Difference]: Finished difference Result 251 states and 555 transitions. [2021-06-12 19:58:23,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:58:23,430 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 [2021-06-12 19:58:23,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:23,431 INFO L225 Difference]: With dead ends: 251 [2021-06-12 19:58:23,431 INFO L226 Difference]: Without dead ends: 251 [2021-06-12 19:58:23,431 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 441.7ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:58:23,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-12 19:58:23,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 214. [2021-06-12 19:58:23,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2582159624413145) internal successors, (481), 213 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:23,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 481 transitions. [2021-06-12 19:58:23,433 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 481 transitions. Word has length 19 [2021-06-12 19:58:23,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:23,433 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 481 transitions. [2021-06-12 19:58:23,433 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) [2021-06-12 19:58:23,433 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 481 transitions. [2021-06-12 19:58:23,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:23,433 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:23,433 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:23,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2505,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:23,637 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:23,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:23,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1258944496, now seen corresponding path program 325 times [2021-06-12 19:58:23,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:23,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260746706] [2021-06-12 19:58:23,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:23,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:23,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260746706] [2021-06-12 19:58:23,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260746706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:23,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991391587] [2021-06-12 19:58:23,760 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 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 [2021-06-12 19:58:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:23,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:23,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:24,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991391587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:24,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:24,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:24,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149152159] [2021-06-12 19:58:24,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:24,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:24,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:24,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:24,003 INFO L87 Difference]: Start difference. First operand 214 states and 481 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) [2021-06-12 19:58:24,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:24,271 INFO L93 Difference]: Finished difference Result 234 states and 520 transitions. [2021-06-12 19:58:24,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:58:24,271 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 [2021-06-12 19:58:24,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:24,271 INFO L225 Difference]: With dead ends: 234 [2021-06-12 19:58:24,271 INFO L226 Difference]: Without dead ends: 234 [2021-06-12 19:58:24,271 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 422.8ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:58:24,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-12 19:58:24,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 211. [2021-06-12 19:58:24,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2523809523809524) internal successors, (473), 210 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) [2021-06-12 19:58:24,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 473 transitions. [2021-06-12 19:58:24,273 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 473 transitions. Word has length 19 [2021-06-12 19:58:24,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:24,273 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 473 transitions. [2021-06-12 19:58:24,273 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) [2021-06-12 19:58:24,273 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 473 transitions. [2021-06-12 19:58:24,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:24,273 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:24,274 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:24,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2513 [2021-06-12 19:58:24,474 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:24,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:24,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1040148465, now seen corresponding path program 326 times [2021-06-12 19:58:24,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:24,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364687414] [2021-06-12 19:58:24,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:24,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:24,595 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:24,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:24,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364687414] [2021-06-12 19:58:24,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364687414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:24,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399378695] [2021-06-12 19:58:24,596 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 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 [2021-06-12 19:58:24,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:24,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:24,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:24,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:24,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:24,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399378695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:24,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:24,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:24,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350684919] [2021-06-12 19:58:24,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:24,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:24,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:24,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:24,865 INFO L87 Difference]: Start difference. First operand 211 states and 473 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) [2021-06-12 19:58:25,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:25,123 INFO L93 Difference]: Finished difference Result 245 states and 534 transitions. [2021-06-12 19:58:25,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:58:25,124 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 [2021-06-12 19:58:25,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:25,124 INFO L225 Difference]: With dead ends: 245 [2021-06-12 19:58:25,124 INFO L226 Difference]: Without dead ends: 245 [2021-06-12 19:58:25,124 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 397.4ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:58:25,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-12 19:58:25,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 213. [2021-06-12 19:58:25,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2547169811320753) internal successors, (478), 212 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) [2021-06-12 19:58:25,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 478 transitions. [2021-06-12 19:58:25,126 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 478 transitions. Word has length 19 [2021-06-12 19:58:25,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:25,126 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 478 transitions. [2021-06-12 19:58:25,126 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) [2021-06-12 19:58:25,126 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 478 transitions. [2021-06-12 19:58:25,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:25,126 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:25,126 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:25,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2521 [2021-06-12 19:58:25,327 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:25,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:25,327 INFO L82 PathProgramCache]: Analyzing trace with hash -752598230, now seen corresponding path program 327 times [2021-06-12 19:58:25,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:25,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659822811] [2021-06-12 19:58:25,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:25,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:25,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:25,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659822811] [2021-06-12 19:58:25,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659822811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:25,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085282640] [2021-06-12 19:58:25,444 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 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 [2021-06-12 19:58:25,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:58:25,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:25,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:25,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:25,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:25,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085282640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:25,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:25,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:25,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801438924] [2021-06-12 19:58:25,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:25,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:25,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:25,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:25,649 INFO L87 Difference]: Start difference. First operand 213 states and 478 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) [2021-06-12 19:58:25,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:25,952 INFO L93 Difference]: Finished difference Result 304 states and 644 transitions. [2021-06-12 19:58:25,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:58:25,952 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 [2021-06-12 19:58:25,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:25,952 INFO L225 Difference]: With dead ends: 304 [2021-06-12 19:58:25,952 INFO L226 Difference]: Without dead ends: 304 [2021-06-12 19:58:25,952 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 367.0ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:58:25,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-12 19:58:25,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 214. [2021-06-12 19:58:25,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.267605633802817) internal successors, (483), 213 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) [2021-06-12 19:58:25,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 483 transitions. [2021-06-12 19:58:25,955 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 483 transitions. Word has length 19 [2021-06-12 19:58:25,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:25,955 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 483 transitions. [2021-06-12 19:58:25,955 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) [2021-06-12 19:58:25,955 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 483 transitions. [2021-06-12 19:58:25,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:25,955 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:25,955 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:26,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2529,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:26,156 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:26,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:26,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1582333741, now seen corresponding path program 328 times [2021-06-12 19:58:26,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:26,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392038775] [2021-06-12 19:58:26,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:26,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:26,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392038775] [2021-06-12 19:58:26,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392038775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:26,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981627266] [2021-06-12 19:58:26,272 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 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 [2021-06-12 19:58:26,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:26,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:26,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:26,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:26,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:26,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981627266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:26,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:26,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:26,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58773421] [2021-06-12 19:58:26,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:26,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:26,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:26,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:26,546 INFO L87 Difference]: Start difference. First operand 214 states and 483 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) [2021-06-12 19:58:26,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:26,730 INFO L93 Difference]: Finished difference Result 232 states and 514 transitions. [2021-06-12 19:58:26,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:58:26,731 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 [2021-06-12 19:58:26,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:26,731 INFO L225 Difference]: With dead ends: 232 [2021-06-12 19:58:26,731 INFO L226 Difference]: Without dead ends: 226 [2021-06-12 19:58:26,731 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 361.6ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:26,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-12 19:58:26,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 214. [2021-06-12 19:58:26,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2629107981220655) internal successors, (482), 213 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) [2021-06-12 19:58:26,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 482 transitions. [2021-06-12 19:58:26,733 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 482 transitions. Word has length 19 [2021-06-12 19:58:26,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:26,733 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 482 transitions. [2021-06-12 19:58:26,733 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) [2021-06-12 19:58:26,733 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 482 transitions. [2021-06-12 19:58:26,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:26,733 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:26,733 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:26,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2536 [2021-06-12 19:58:26,934 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:26,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:26,934 INFO L82 PathProgramCache]: Analyzing trace with hash -450607950, now seen corresponding path program 329 times [2021-06-12 19:58:26,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:26,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511870448] [2021-06-12 19:58:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:27,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:27,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511870448] [2021-06-12 19:58:27,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511870448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:27,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858388874] [2021-06-12 19:58:27,093 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 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 [2021-06-12 19:58:27,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:58:27,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:27,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:27,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:27,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858388874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:27,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:27,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:27,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467459704] [2021-06-12 19:58:27,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:27,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:27,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:27,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:27,300 INFO L87 Difference]: Start difference. First operand 214 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) [2021-06-12 19:58:27,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:27,511 INFO L93 Difference]: Finished difference Result 248 states and 548 transitions. [2021-06-12 19:58:27,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:58:27,512 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 [2021-06-12 19:58:27,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:27,512 INFO L225 Difference]: With dead ends: 248 [2021-06-12 19:58:27,512 INFO L226 Difference]: Without dead ends: 248 [2021-06-12 19:58:27,512 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 307.7ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:58:27,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-12 19:58:27,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 210. [2021-06-12 19:58:27,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2535885167464116) internal successors, (471), 209 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) [2021-06-12 19:58:27,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-06-12 19:58:27,514 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-06-12 19:58:27,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:27,514 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-06-12 19:58:27,514 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) [2021-06-12 19:58:27,514 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-06-12 19:58:27,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:27,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:27,517 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:27,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2544 [2021-06-12 19:58:27,733 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:27,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:27,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1075773305, now seen corresponding path program 330 times [2021-06-12 19:58:27,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:27,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871928273] [2021-06-12 19:58:27,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:27,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:27,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871928273] [2021-06-12 19:58:27,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871928273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:27,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982690329] [2021-06-12 19:58:27,861 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 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 [2021-06-12 19:58:27,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:58:27,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:27,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:27,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:28,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982690329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:28,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:28,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:28,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642085146] [2021-06-12 19:58:28,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:28,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:28,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:28,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:28,073 INFO L87 Difference]: Start difference. First operand 210 states and 471 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) [2021-06-12 19:58:28,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:28,253 INFO L93 Difference]: Finished difference Result 242 states and 535 transitions. [2021-06-12 19:58:28,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:58:28,253 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 [2021-06-12 19:58:28,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:28,253 INFO L225 Difference]: With dead ends: 242 [2021-06-12 19:58:28,253 INFO L226 Difference]: Without dead ends: 242 [2021-06-12 19:58:28,254 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 309.5ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:58:28,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-12 19:58:28,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 211. [2021-06-12 19:58:28,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2523809523809524) internal successors, (473), 210 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) [2021-06-12 19:58:28,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 473 transitions. [2021-06-12 19:58:28,255 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 473 transitions. Word has length 19 [2021-06-12 19:58:28,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:28,255 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 473 transitions. [2021-06-12 19:58:28,255 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) [2021-06-12 19:58:28,256 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 473 transitions. [2021-06-12 19:58:28,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:28,256 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:28,256 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:28,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2549 [2021-06-12 19:58:28,456 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:28,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:28,457 INFO L82 PathProgramCache]: Analyzing trace with hash -279037553, now seen corresponding path program 331 times [2021-06-12 19:58:28,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:28,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522492007] [2021-06-12 19:58:28,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:28,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:28,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522492007] [2021-06-12 19:58:28,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522492007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:28,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595358375] [2021-06-12 19:58:28,578 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 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 [2021-06-12 19:58:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:28,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:28,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:28,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595358375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:28,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:28,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:28,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860524627] [2021-06-12 19:58:28,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:28,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:28,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:28,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:28,793 INFO L87 Difference]: Start difference. First operand 211 states and 473 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) [2021-06-12 19:58:29,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:29,064 INFO L93 Difference]: Finished difference Result 258 states and 564 transitions. [2021-06-12 19:58:29,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:58:29,064 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 [2021-06-12 19:58:29,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:29,064 INFO L225 Difference]: With dead ends: 258 [2021-06-12 19:58:29,064 INFO L226 Difference]: Without dead ends: 255 [2021-06-12 19:58:29,065 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 382.2ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:58:29,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-12 19:58:29,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 212. [2021-06-12 19:58:29,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.255924170616114) internal successors, (476), 211 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:29,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 476 transitions. [2021-06-12 19:58:29,066 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 476 transitions. Word has length 19 [2021-06-12 19:58:29,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:29,067 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 476 transitions. [2021-06-12 19:58:29,067 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) [2021-06-12 19:58:29,067 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 476 transitions. [2021-06-12 19:58:29,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:29,067 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:29,067 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:29,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2554 [2021-06-12 19:58:29,267 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:29,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:29,268 INFO L82 PathProgramCache]: Analyzing trace with hash 848358540, now seen corresponding path program 332 times [2021-06-12 19:58:29,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:29,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346920064] [2021-06-12 19:58:29,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:29,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:29,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:29,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346920064] [2021-06-12 19:58:29,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346920064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:29,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333726279] [2021-06-12 19:58:29,386 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 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 [2021-06-12 19:58:29,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:29,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:29,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:29,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:29,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333726279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:29,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:29,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:29,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768768934] [2021-06-12 19:58:29,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:29,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:29,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:29,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:29,630 INFO L87 Difference]: Start difference. First operand 212 states and 476 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) [2021-06-12 19:58:30,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:30,292 INFO L93 Difference]: Finished difference Result 349 states and 723 transitions. [2021-06-12 19:58:30,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:58:30,292 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 [2021-06-12 19:58:30,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:30,293 INFO L225 Difference]: With dead ends: 349 [2021-06-12 19:58:30,293 INFO L226 Difference]: Without dead ends: 349 [2021-06-12 19:58:30,293 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 783.4ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:58:30,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-12 19:58:30,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 216. [2021-06-12 19:58:30,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.2837209302325583) internal successors, (491), 215 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) [2021-06-12 19:58:30,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 491 transitions. [2021-06-12 19:58:30,295 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 491 transitions. Word has length 19 [2021-06-12 19:58:30,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:30,295 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 491 transitions. [2021-06-12 19:58:30,295 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) [2021-06-12 19:58:30,295 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 491 transitions. [2021-06-12 19:58:30,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:30,296 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:30,296 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:30,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2561,333 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:30,496 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:30,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:30,496 INFO L82 PathProgramCache]: Analyzing trace with hash 227308713, now seen corresponding path program 333 times [2021-06-12 19:58:30,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:30,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186492616] [2021-06-12 19:58:30,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:30,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:30,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:30,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186492616] [2021-06-12 19:58:30,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186492616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:30,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50472188] [2021-06-12 19:58:30,621 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 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 [2021-06-12 19:58:30,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:58:30,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:30,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:30,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:30,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50472188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:30,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:30,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:30,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074474337] [2021-06-12 19:58:30,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:30,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:30,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:30,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:30,893 INFO L87 Difference]: Start difference. First operand 216 states and 491 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) [2021-06-12 19:58:31,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:31,277 INFO L93 Difference]: Finished difference Result 239 states and 532 transitions. [2021-06-12 19:58:31,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:58:31,277 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 [2021-06-12 19:58:31,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:31,278 INFO L225 Difference]: With dead ends: 239 [2021-06-12 19:58:31,278 INFO L226 Difference]: Without dead ends: 233 [2021-06-12 19:58:31,278 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 532.3ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:58:31,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-12 19:58:31,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 216. [2021-06-12 19:58:31,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.2790697674418605) internal successors, (490), 215 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) [2021-06-12 19:58:31,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 490 transitions. [2021-06-12 19:58:31,280 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 490 transitions. Word has length 19 [2021-06-12 19:58:31,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:31,280 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 490 transitions. [2021-06-12 19:58:31,280 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) [2021-06-12 19:58:31,280 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 490 transitions. [2021-06-12 19:58:31,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:31,280 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:31,280 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:31,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2569,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:31,480 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:31,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:31,481 INFO L82 PathProgramCache]: Analyzing trace with hash 514858948, now seen corresponding path program 334 times [2021-06-12 19:58:31,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:31,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002890179] [2021-06-12 19:58:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:31,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:31,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:31,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002890179] [2021-06-12 19:58:31,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002890179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:31,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636291828] [2021-06-12 19:58:31,597 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 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 [2021-06-12 19:58:31,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:31,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:31,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:31,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:31,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:31,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636291828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:31,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:31,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:31,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914590553] [2021-06-12 19:58:31,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:31,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:31,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:31,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:31,801 INFO L87 Difference]: Start difference. First operand 216 states and 490 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) [2021-06-12 19:58:32,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:32,215 INFO L93 Difference]: Finished difference Result 293 states and 629 transitions. [2021-06-12 19:58:32,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:58:32,216 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 [2021-06-12 19:58:32,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:32,216 INFO L225 Difference]: With dead ends: 293 [2021-06-12 19:58:32,216 INFO L226 Difference]: Without dead ends: 293 [2021-06-12 19:58:32,216 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 493.5ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:58:32,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-06-12 19:58:32,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 213. [2021-06-12 19:58:32,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2641509433962264) internal successors, (480), 212 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:32,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 480 transitions. [2021-06-12 19:58:32,218 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 480 transitions. Word has length 19 [2021-06-12 19:58:32,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:32,218 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 480 transitions. [2021-06-12 19:58:32,218 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) [2021-06-12 19:58:32,218 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 480 transitions. [2021-06-12 19:58:32,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:32,218 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:32,219 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:32,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2577 [2021-06-12 19:58:32,419 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:32,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:32,419 INFO L82 PathProgramCache]: Analyzing trace with hash 816849228, now seen corresponding path program 335 times [2021-06-12 19:58:32,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:32,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064058851] [2021-06-12 19:58:32,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:32,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:32,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064058851] [2021-06-12 19:58:32,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064058851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:32,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959296526] [2021-06-12 19:58:32,546 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 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 [2021-06-12 19:58:32,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:58:32,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:32,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:32,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:32,750 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:32,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959296526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:32,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:32,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:32,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124220986] [2021-06-12 19:58:32,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:32,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:32,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:32,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:32,751 INFO L87 Difference]: Start difference. First operand 213 states and 480 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) [2021-06-12 19:58:32,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:32,998 INFO L93 Difference]: Finished difference Result 250 states and 552 transitions. [2021-06-12 19:58:32,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:58:32,998 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 [2021-06-12 19:58:32,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:32,999 INFO L225 Difference]: With dead ends: 250 [2021-06-12 19:58:32,999 INFO L226 Difference]: Without dead ends: 250 [2021-06-12 19:58:32,999 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 346.8ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:32,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-06-12 19:58:33,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 210. [2021-06-12 19:58:33,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2535885167464116) internal successors, (471), 209 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) [2021-06-12 19:58:33,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-06-12 19:58:33,001 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-06-12 19:58:33,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:33,001 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-06-12 19:58:33,001 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) [2021-06-12 19:58:33,001 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-06-12 19:58:33,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:33,001 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:33,001 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:33,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2584,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:33,202 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:33,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:33,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1255826225, now seen corresponding path program 336 times [2021-06-12 19:58:33,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:33,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202217319] [2021-06-12 19:58:33,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:33,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:33,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202217319] [2021-06-12 19:58:33,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202217319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:33,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101498012] [2021-06-12 19:58:33,303 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 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 [2021-06-12 19:58:33,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:58:33,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:33,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:33,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:33,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:33,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101498012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:33,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:33,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:33,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97310076] [2021-06-12 19:58:33,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:33,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:33,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:33,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:33,595 INFO L87 Difference]: Start difference. First operand 210 states and 471 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) [2021-06-12 19:58:33,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:33,998 INFO L93 Difference]: Finished difference Result 251 states and 546 transitions. [2021-06-12 19:58:33,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:58:33,998 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 [2021-06-12 19:58:33,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:33,999 INFO L225 Difference]: With dead ends: 251 [2021-06-12 19:58:33,999 INFO L226 Difference]: Without dead ends: 251 [2021-06-12 19:58:33,999 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 511.1ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:58:33,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-12 19:58:34,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 213. [2021-06-12 19:58:34,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.259433962264151) internal successors, (479), 212 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) [2021-06-12 19:58:34,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 479 transitions. [2021-06-12 19:58:34,005 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 479 transitions. Word has length 19 [2021-06-12 19:58:34,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:34,005 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 479 transitions. [2021-06-12 19:58:34,005 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) [2021-06-12 19:58:34,005 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 479 transitions. [2021-06-12 19:58:34,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:34,006 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:34,006 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:34,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2589 [2021-06-12 19:58:34,206 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:34,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:34,206 INFO L82 PathProgramCache]: Analyzing trace with hash -968275990, now seen corresponding path program 337 times [2021-06-12 19:58:34,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:34,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111878492] [2021-06-12 19:58:34,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:34,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:34,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111878492] [2021-06-12 19:58:34,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111878492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:34,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276485504] [2021-06-12 19:58:34,304 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 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 [2021-06-12 19:58:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:34,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:34,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:34,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:34,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276485504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:34,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:34,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:34,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866652337] [2021-06-12 19:58:34,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:34,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:34,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:34,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:34,518 INFO L87 Difference]: Start difference. First operand 213 states and 479 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) [2021-06-12 19:58:35,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:35,101 INFO L93 Difference]: Finished difference Result 303 states and 647 transitions. [2021-06-12 19:58:35,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:58:35,101 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 [2021-06-12 19:58:35,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:35,102 INFO L225 Difference]: With dead ends: 303 [2021-06-12 19:58:35,102 INFO L226 Difference]: Without dead ends: 303 [2021-06-12 19:58:35,102 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 603.0ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:58:35,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-12 19:58:35,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 215. [2021-06-12 19:58:35,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2757009345794392) internal successors, (487), 214 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:35,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 487 transitions. [2021-06-12 19:58:35,104 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 487 transitions. Word has length 19 [2021-06-12 19:58:35,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:35,104 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 487 transitions. [2021-06-12 19:58:35,104 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) [2021-06-12 19:58:35,104 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 487 transitions. [2021-06-12 19:58:35,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:35,105 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:35,105 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:35,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2597 [2021-06-12 19:58:35,305 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:35,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:35,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1366655981, now seen corresponding path program 338 times [2021-06-12 19:58:35,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:35,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256841369] [2021-06-12 19:58:35,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:35,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:35,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256841369] [2021-06-12 19:58:35,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256841369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:35,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220980650] [2021-06-12 19:58:35,409 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 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 [2021-06-12 19:58:35,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:35,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:35,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:35,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:35,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220980650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:35,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:35,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:35,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122347382] [2021-06-12 19:58:35,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:35,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:35,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:35,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:35,702 INFO L87 Difference]: Start difference. First operand 215 states and 487 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) [2021-06-12 19:58:36,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:36,060 INFO L93 Difference]: Finished difference Result 239 states and 529 transitions. [2021-06-12 19:58:36,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:58:36,060 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 [2021-06-12 19:58:36,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:36,061 INFO L225 Difference]: With dead ends: 239 [2021-06-12 19:58:36,061 INFO L226 Difference]: Without dead ends: 230 [2021-06-12 19:58:36,061 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 520.3ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:58:36,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-12 19:58:36,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 215. [2021-06-12 19:58:36,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2663551401869158) internal successors, (485), 214 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) [2021-06-12 19:58:36,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 485 transitions. [2021-06-12 19:58:36,063 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 485 transitions. Word has length 19 [2021-06-12 19:58:36,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:36,063 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 485 transitions. [2021-06-12 19:58:36,063 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) [2021-06-12 19:58:36,063 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 485 transitions. [2021-06-12 19:58:36,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:36,063 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:36,063 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:36,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2604,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:36,264 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:36,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:36,264 INFO L82 PathProgramCache]: Analyzing trace with hash -666285710, now seen corresponding path program 339 times [2021-06-12 19:58:36,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:36,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858085867] [2021-06-12 19:58:36,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:36,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:36,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858085867] [2021-06-12 19:58:36,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858085867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:36,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054971506] [2021-06-12 19:58:36,369 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 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 [2021-06-12 19:58:36,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:58:36,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:36,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:36,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:36,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:36,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054971506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:36,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:36,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:36,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629559038] [2021-06-12 19:58:36,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:36,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:36,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:36,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:36,583 INFO L87 Difference]: Start difference. First operand 215 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) [2021-06-12 19:58:37,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:37,029 INFO L93 Difference]: Finished difference Result 258 states and 569 transitions. [2021-06-12 19:58:37,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:58:37,029 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 [2021-06-12 19:58:37,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:37,029 INFO L225 Difference]: With dead ends: 258 [2021-06-12 19:58:37,029 INFO L226 Difference]: Without dead ends: 258 [2021-06-12 19:58:37,029 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 504.9ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:58:37,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-06-12 19:58:37,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 214. [2021-06-12 19:58:37,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.267605633802817) internal successors, (483), 213 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) [2021-06-12 19:58:37,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 483 transitions. [2021-06-12 19:58:37,031 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 483 transitions. Word has length 19 [2021-06-12 19:58:37,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:37,032 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 483 transitions. [2021-06-12 19:58:37,032 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) [2021-06-12 19:58:37,032 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 483 transitions. [2021-06-12 19:58:37,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:37,032 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:37,032 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:37,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2612 [2021-06-12 19:58:37,232 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:37,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:37,233 INFO L82 PathProgramCache]: Analyzing trace with hash -159939444, now seen corresponding path program 340 times [2021-06-12 19:58:37,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:37,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888002154] [2021-06-12 19:58:37,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:37,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:37,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:37,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888002154] [2021-06-12 19:58:37,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888002154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:37,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067165164] [2021-06-12 19:58:37,342 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 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 [2021-06-12 19:58:37,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:37,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:37,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:37,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:37,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067165164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:37,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:37,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:37,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499209040] [2021-06-12 19:58:37,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:37,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:37,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:37,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:37,553 INFO L87 Difference]: Start difference. First operand 214 states and 483 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) [2021-06-12 19:58:37,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:37,809 INFO L93 Difference]: Finished difference Result 246 states and 543 transitions. [2021-06-12 19:58:37,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:58:37,809 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 [2021-06-12 19:58:37,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:37,810 INFO L225 Difference]: With dead ends: 246 [2021-06-12 19:58:37,810 INFO L226 Difference]: Without dead ends: 246 [2021-06-12 19:58:37,810 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 299.4ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:37,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-12 19:58:37,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 210. [2021-06-12 19:58:37,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2535885167464116) internal successors, (471), 209 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) [2021-06-12 19:58:37,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-06-12 19:58:37,812 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-06-12 19:58:37,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:37,812 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-06-12 19:58:37,812 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) [2021-06-12 19:58:37,812 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-06-12 19:58:37,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:37,813 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:37,813 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:38,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2617,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:38,035 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:38,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:38,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1533464087, now seen corresponding path program 341 times [2021-06-12 19:58:38,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:38,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901091804] [2021-06-12 19:58:38,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:38,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:38,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901091804] [2021-06-12 19:58:38,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901091804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:38,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679288674] [2021-06-12 19:58:38,138 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 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 [2021-06-12 19:58:38,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:58:38,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:38,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:38,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:38,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679288674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:38,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:38,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:38,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838484268] [2021-06-12 19:58:38,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:38,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:38,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:38,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:38,357 INFO L87 Difference]: Start difference. First operand 210 states and 471 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) [2021-06-12 19:58:38,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:38,524 INFO L93 Difference]: Finished difference Result 232 states and 515 transitions. [2021-06-12 19:58:38,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:58:38,524 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 [2021-06-12 19:58:38,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:38,525 INFO L225 Difference]: With dead ends: 232 [2021-06-12 19:58:38,525 INFO L226 Difference]: Without dead ends: 232 [2021-06-12 19:58:38,525 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 235.3ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:38,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-12 19:58:38,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 210. [2021-06-12 19:58:38,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2535885167464116) internal successors, (471), 209 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) [2021-06-12 19:58:38,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-06-12 19:58:38,527 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-06-12 19:58:38,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:38,527 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-06-12 19:58:38,527 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) [2021-06-12 19:58:38,527 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-06-12 19:58:38,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:38,527 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:38,527 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:38,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2622,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:38,728 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:38,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:38,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1690507745, now seen corresponding path program 342 times [2021-06-12 19:58:38,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:38,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355553075] [2021-06-12 19:58:38,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:38,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:38,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355553075] [2021-06-12 19:58:38,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355553075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:38,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303677645] [2021-06-12 19:58:38,831 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 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 [2021-06-12 19:58:38,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:58:38,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:38,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:58:38,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:39,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:39,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303677645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:39,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:39,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:39,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075421670] [2021-06-12 19:58:39,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:39,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:39,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:39,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:39,054 INFO L87 Difference]: Start difference. First operand 210 states and 471 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) [2021-06-12 19:58:39,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:39,482 INFO L93 Difference]: Finished difference Result 247 states and 545 transitions. [2021-06-12 19:58:39,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:58:39,482 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 [2021-06-12 19:58:39,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:39,483 INFO L225 Difference]: With dead ends: 247 [2021-06-12 19:58:39,483 INFO L226 Difference]: Without dead ends: 247 [2021-06-12 19:58:39,483 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 460.8ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:58:39,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-12 19:58:39,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 210. [2021-06-12 19:58:39,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2535885167464116) internal successors, (471), 209 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) [2021-06-12 19:58:39,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-06-12 19:58:39,485 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-06-12 19:58:39,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:39,485 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-06-12 19:58:39,485 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) [2021-06-12 19:58:39,485 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-06-12 19:58:39,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:39,485 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:39,485 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:39,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2627,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:39,685 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:39,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:39,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1807723799, now seen corresponding path program 343 times [2021-06-12 19:58:39,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:39,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255552008] [2021-06-12 19:58:39,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:39,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:39,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255552008] [2021-06-12 19:58:39,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255552008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:39,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551389961] [2021-06-12 19:58:39,785 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 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 [2021-06-12 19:58:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:39,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:39,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:40,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:40,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551389961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:40,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:40,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:40,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608796616] [2021-06-12 19:58:40,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:40,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:40,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:40,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:40,004 INFO L87 Difference]: Start difference. First operand 210 states and 471 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) [2021-06-12 19:58:40,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:40,488 INFO L93 Difference]: Finished difference Result 262 states and 570 transitions. [2021-06-12 19:58:40,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:58:40,488 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 [2021-06-12 19:58:40,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:40,489 INFO L225 Difference]: With dead ends: 262 [2021-06-12 19:58:40,489 INFO L226 Difference]: Without dead ends: 259 [2021-06-12 19:58:40,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 491.2ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:58:40,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-06-12 19:58:40,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 210. [2021-06-12 19:58:40,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.248803827751196) internal successors, (470), 209 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:40,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 470 transitions. [2021-06-12 19:58:40,491 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 470 transitions. Word has length 19 [2021-06-12 19:58:40,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:40,491 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 470 transitions. [2021-06-12 19:58:40,491 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) [2021-06-12 19:58:40,491 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 470 transitions. [2021-06-12 19:58:40,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:40,491 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:40,491 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:40,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2632,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:40,692 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:40,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:40,692 INFO L82 PathProgramCache]: Analyzing trace with hash -680327706, now seen corresponding path program 344 times [2021-06-12 19:58:40,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:40,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355390859] [2021-06-12 19:58:40,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:40,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:40,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:40,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355390859] [2021-06-12 19:58:40,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355390859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:40,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790605214] [2021-06-12 19:58:40,797 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 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 [2021-06-12 19:58:40,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:40,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:40,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:40,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:41,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790605214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:41,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:41,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:41,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918632529] [2021-06-12 19:58:41,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:41,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:41,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:41,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:41,055 INFO L87 Difference]: Start difference. First operand 210 states and 470 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) [2021-06-12 19:58:41,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:41,314 INFO L93 Difference]: Finished difference Result 238 states and 522 transitions. [2021-06-12 19:58:41,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:58:41,314 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 [2021-06-12 19:58:41,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:41,314 INFO L225 Difference]: With dead ends: 238 [2021-06-12 19:58:41,314 INFO L226 Difference]: Without dead ends: 236 [2021-06-12 19:58:41,314 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 359.3ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:41,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-12 19:58:41,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 206. [2021-06-12 19:58:41,316 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) [2021-06-12 19:58:41,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-06-12 19:58:41,316 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 19 [2021-06-12 19:58:41,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:41,316 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-06-12 19:58:41,316 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) [2021-06-12 19:58:41,316 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-06-12 19:58:41,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:41,317 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:41,317 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:41,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2639 [2021-06-12 19:58:41,517 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:41,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:41,517 INFO L82 PathProgramCache]: Analyzing trace with hash 207372807, now seen corresponding path program 345 times [2021-06-12 19:58:41,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:41,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520907272] [2021-06-12 19:58:41,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:41,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:41,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:41,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520907272] [2021-06-12 19:58:41,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520907272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:41,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622051954] [2021-06-12 19:58:41,644 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 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 [2021-06-12 19:58:41,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:58:41,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:41,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:41,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:41,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622051954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:41,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:41,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:41,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961660778] [2021-06-12 19:58:41,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:41,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:41,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:41,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:41,860 INFO L87 Difference]: Start difference. First operand 206 states and 459 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) [2021-06-12 19:58:42,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:42,079 INFO L93 Difference]: Finished difference Result 235 states and 517 transitions. [2021-06-12 19:58:42,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:58:42,080 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 [2021-06-12 19:58:42,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:42,080 INFO L225 Difference]: With dead ends: 235 [2021-06-12 19:58:42,080 INFO L226 Difference]: Without dead ends: 235 [2021-06-12 19:58:42,080 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 311.2ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:58:42,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-12 19:58:42,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2021-06-12 19:58:42,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.236714975845411) internal successors, (463), 207 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:42,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-06-12 19:58:42,082 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-06-12 19:58:42,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:42,082 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-06-12 19:58:42,082 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) [2021-06-12 19:58:42,082 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-06-12 19:58:42,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:42,082 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:42,082 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:42,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2647,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:42,283 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:42,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:42,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1004108559, now seen corresponding path program 346 times [2021-06-12 19:58:42,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:42,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486328727] [2021-06-12 19:58:42,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:42,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:42,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486328727] [2021-06-12 19:58:42,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486328727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:42,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298159096] [2021-06-12 19:58:42,406 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 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 [2021-06-12 19:58:42,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:42,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:42,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:42,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:42,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298159096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:42,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:42,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:42,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546429769] [2021-06-12 19:58:42,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:42,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:42,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:42,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:42,611 INFO L87 Difference]: Start difference. First operand 208 states and 463 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) [2021-06-12 19:58:42,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:42,964 INFO L93 Difference]: Finished difference Result 258 states and 560 transitions. [2021-06-12 19:58:42,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:58:42,964 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 [2021-06-12 19:58:42,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:42,964 INFO L225 Difference]: With dead ends: 258 [2021-06-12 19:58:42,964 INFO L226 Difference]: Without dead ends: 255 [2021-06-12 19:58:42,965 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 453.0ms TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:58:42,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-12 19:58:42,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 209. [2021-06-12 19:58:42,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2403846153846154) internal successors, (466), 208 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) [2021-06-12 19:58:42,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 466 transitions. [2021-06-12 19:58:42,966 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 466 transitions. Word has length 19 [2021-06-12 19:58:42,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:42,966 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 466 transitions. [2021-06-12 19:58:42,966 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) [2021-06-12 19:58:42,967 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 466 transitions. [2021-06-12 19:58:42,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:42,967 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:42,967 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:43,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2652 [2021-06-12 19:58:43,167 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:43,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:43,167 INFO L82 PathProgramCache]: Analyzing trace with hash 2131504652, now seen corresponding path program 347 times [2021-06-12 19:58:43,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:43,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120112637] [2021-06-12 19:58:43,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:43,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:43,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:43,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120112637] [2021-06-12 19:58:43,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120112637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:43,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877776737] [2021-06-12 19:58:43,297 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 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 [2021-06-12 19:58:43,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:58:43,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:43,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:43,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:43,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877776737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:43,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:43,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:43,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238942618] [2021-06-12 19:58:43,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:43,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:43,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:43,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:43,542 INFO L87 Difference]: Start difference. First operand 209 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) [2021-06-12 19:58:44,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:44,311 INFO L93 Difference]: Finished difference Result 343 states and 704 transitions. [2021-06-12 19:58:44,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:58:44,311 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 [2021-06-12 19:58:44,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:44,312 INFO L225 Difference]: With dead ends: 343 [2021-06-12 19:58:44,312 INFO L226 Difference]: Without dead ends: 341 [2021-06-12 19:58:44,312 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 837.7ms TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:58:44,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-06-12 19:58:44,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 213. [2021-06-12 19:58:44,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2641509433962264) internal successors, (480), 212 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:44,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 480 transitions. [2021-06-12 19:58:44,314 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 480 transitions. Word has length 19 [2021-06-12 19:58:44,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:44,314 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 480 transitions. [2021-06-12 19:58:44,314 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) [2021-06-12 19:58:44,314 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 480 transitions. [2021-06-12 19:58:44,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:44,314 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:44,314 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:44,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2659,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:44,515 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:44,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:44,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1510454825, now seen corresponding path program 348 times [2021-06-12 19:58:44,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:44,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504301809] [2021-06-12 19:58:44,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:44,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:44,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:44,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504301809] [2021-06-12 19:58:44,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504301809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:44,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040889287] [2021-06-12 19:58:44,664 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 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 [2021-06-12 19:58:44,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:58:44,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:44,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:44,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:44,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:44,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040889287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:44,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:44,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:44,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534821742] [2021-06-12 19:58:44,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:44,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:44,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:44,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:44,949 INFO L87 Difference]: Start difference. First operand 213 states and 480 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) [2021-06-12 19:58:45,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:45,189 INFO L93 Difference]: Finished difference Result 234 states and 522 transitions. [2021-06-12 19:58:45,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:58:45,189 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 [2021-06-12 19:58:45,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:45,189 INFO L225 Difference]: With dead ends: 234 [2021-06-12 19:58:45,189 INFO L226 Difference]: Without dead ends: 234 [2021-06-12 19:58:45,190 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 421.7ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:45,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-12 19:58:45,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 213. [2021-06-12 19:58:45,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2641509433962264) internal successors, (480), 212 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:45,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 480 transitions. [2021-06-12 19:58:45,191 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 480 transitions. Word has length 19 [2021-06-12 19:58:45,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:45,192 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 480 transitions. [2021-06-12 19:58:45,192 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) [2021-06-12 19:58:45,192 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 480 transitions. [2021-06-12 19:58:45,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:45,192 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:45,192 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:45,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2667,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:45,392 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:45,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:45,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1798005060, now seen corresponding path program 349 times [2021-06-12 19:58:45,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:45,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390069673] [2021-06-12 19:58:45,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:45,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:45,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390069673] [2021-06-12 19:58:45,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390069673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:45,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824349955] [2021-06-12 19:58:45,518 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 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 [2021-06-12 19:58:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:45,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:58:45,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:45,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824349955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:45,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:45,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:45,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163677387] [2021-06-12 19:58:45,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:45,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:45,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:45,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:45,787 INFO L87 Difference]: Start difference. First operand 213 states and 480 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) [2021-06-12 19:58:46,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:46,167 INFO L93 Difference]: Finished difference Result 277 states and 597 transitions. [2021-06-12 19:58:46,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:58:46,167 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 [2021-06-12 19:58:46,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:46,168 INFO L225 Difference]: With dead ends: 277 [2021-06-12 19:58:46,168 INFO L226 Difference]: Without dead ends: 277 [2021-06-12 19:58:46,168 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 559.8ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:58:46,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-12 19:58:46,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 210. [2021-06-12 19:58:46,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.248803827751196) internal successors, (470), 209 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:46,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 470 transitions. [2021-06-12 19:58:46,170 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 470 transitions. Word has length 19 [2021-06-12 19:58:46,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:46,170 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 470 transitions. [2021-06-12 19:58:46,170 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) [2021-06-12 19:58:46,170 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 470 transitions. [2021-06-12 19:58:46,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:46,170 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:46,170 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:46,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2675 [2021-06-12 19:58:46,371 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:46,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:46,371 INFO L82 PathProgramCache]: Analyzing trace with hash 2099995340, now seen corresponding path program 350 times [2021-06-12 19:58:46,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:46,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623805559] [2021-06-12 19:58:46,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:46,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:46,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623805559] [2021-06-12 19:58:46,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623805559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:46,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290775122] [2021-06-12 19:58:46,491 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 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 [2021-06-12 19:58:46,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:46,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:46,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:46,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:46,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290775122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:46,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:46,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:46,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121538341] [2021-06-12 19:58:46,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:46,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:46,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:46,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:46,700 INFO L87 Difference]: Start difference. First operand 210 states and 470 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) [2021-06-12 19:58:46,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:46,919 INFO L93 Difference]: Finished difference Result 248 states and 543 transitions. [2021-06-12 19:58:46,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:58:46,920 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 [2021-06-12 19:58:46,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:46,920 INFO L225 Difference]: With dead ends: 248 [2021-06-12 19:58:46,920 INFO L226 Difference]: Without dead ends: 248 [2021-06-12 19:58:46,920 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 303.8ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:58:46,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-12 19:58:46,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 205. [2021-06-12 19:58:46,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2401960784313726) internal successors, (457), 204 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:46,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 457 transitions. [2021-06-12 19:58:46,922 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 457 transitions. Word has length 19 [2021-06-12 19:58:46,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:46,922 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 457 transitions. [2021-06-12 19:58:46,922 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) [2021-06-12 19:58:46,922 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 457 transitions. [2021-06-12 19:58:46,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:46,922 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:46,922 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:47,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2681,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:47,123 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:47,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:47,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1474829985, now seen corresponding path program 351 times [2021-06-12 19:58:47,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:47,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036818061] [2021-06-12 19:58:47,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:47,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:47,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036818061] [2021-06-12 19:58:47,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036818061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:47,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60687332] [2021-06-12 19:58:47,249 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 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 [2021-06-12 19:58:47,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:58:47,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:47,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:58:47,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:47,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60687332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:47,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:47,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:58:47,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725794308] [2021-06-12 19:58:47,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:58:47,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:47,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:58:47,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:58:47,469 INFO L87 Difference]: Start difference. First operand 205 states and 457 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) [2021-06-12 19:58:47,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:47,633 INFO L93 Difference]: Finished difference Result 235 states and 517 transitions. [2021-06-12 19:58:47,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:58:47,633 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 [2021-06-12 19:58:47,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:47,633 INFO L225 Difference]: With dead ends: 235 [2021-06-12 19:58:47,634 INFO L226 Difference]: Without dead ends: 235 [2021-06-12 19:58:47,634 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 256.9ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:58:47,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-12 19:58:47,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2021-06-12 19:58:47,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.236714975845411) internal successors, (463), 207 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:47,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-06-12 19:58:47,635 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-06-12 19:58:47,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:47,636 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-06-12 19:58:47,636 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) [2021-06-12 19:58:47,636 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-06-12 19:58:47,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:47,636 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:47,636 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:47,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2686,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:47,836 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:47,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:47,837 INFO L82 PathProgramCache]: Analyzing trace with hash -2023401559, now seen corresponding path program 352 times [2021-06-12 19:58:47,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:47,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24036079] [2021-06-12 19:58:47,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:47,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:47,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:47,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24036079] [2021-06-12 19:58:47,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24036079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:47,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645962942] [2021-06-12 19:58:47,965 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 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 [2021-06-12 19:58:47,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:47,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:47,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:47,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:48,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645962942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:48,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:48,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:48,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436857399] [2021-06-12 19:58:48,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:48,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:48,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:48,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:48,167 INFO L87 Difference]: Start difference. First operand 208 states and 463 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) [2021-06-12 19:58:48,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:48,291 INFO L93 Difference]: Finished difference Result 255 states and 554 transitions. [2021-06-12 19:58:48,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:58:48,291 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 [2021-06-12 19:58:48,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:48,292 INFO L225 Difference]: With dead ends: 255 [2021-06-12 19:58:48,292 INFO L226 Difference]: Without dead ends: 252 [2021-06-12 19:58:48,292 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 257.3ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:58:48,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-12 19:58:48,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 209. [2021-06-12 19:58:48,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2403846153846154) internal successors, (466), 208 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) [2021-06-12 19:58:48,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 466 transitions. [2021-06-12 19:58:48,294 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 466 transitions. Word has length 19 [2021-06-12 19:58:48,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:48,294 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 466 transitions. [2021-06-12 19:58:48,294 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) [2021-06-12 19:58:48,294 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 466 transitions. [2021-06-12 19:58:48,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:48,294 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:48,294 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:48,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2691,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:48,494 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:48,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:48,495 INFO L82 PathProgramCache]: Analyzing trace with hash -896005466, now seen corresponding path program 353 times [2021-06-12 19:58:48,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:48,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213476950] [2021-06-12 19:58:48,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:48,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:48,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213476950] [2021-06-12 19:58:48,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213476950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:48,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990206251] [2021-06-12 19:58:48,641 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 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 [2021-06-12 19:58:48,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:58:48,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:48,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:48,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:48,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:48,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990206251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:48,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:48,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:48,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686448138] [2021-06-12 19:58:48,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:48,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:48,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:48,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:48,880 INFO L87 Difference]: Start difference. First operand 209 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) [2021-06-12 19:58:49,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:49,051 INFO L93 Difference]: Finished difference Result 231 states and 507 transitions. [2021-06-12 19:58:49,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:58:49,051 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 [2021-06-12 19:58:49,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:49,051 INFO L225 Difference]: With dead ends: 231 [2021-06-12 19:58:49,051 INFO L226 Difference]: Without dead ends: 229 [2021-06-12 19:58:49,051 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 301.6ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:58:49,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-12 19:58:49,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 207. [2021-06-12 19:58:49,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.237864077669903) internal successors, (461), 206 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:49,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 461 transitions. [2021-06-12 19:58:49,053 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 461 transitions. Word has length 19 [2021-06-12 19:58:49,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:49,053 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 461 transitions. [2021-06-12 19:58:49,053 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) [2021-06-12 19:58:49,053 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 461 transitions. [2021-06-12 19:58:49,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:49,054 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:49,054 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:49,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2698,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:49,254 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:49,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:49,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1517055293, now seen corresponding path program 354 times [2021-06-12 19:58:49,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:49,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613500795] [2021-06-12 19:58:49,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:49,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:49,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613500795] [2021-06-12 19:58:49,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613500795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:49,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444987440] [2021-06-12 19:58:49,377 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 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 [2021-06-12 19:58:49,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:58:49,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:49,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:49,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:49,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444987440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:49,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:49,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:49,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661938800] [2021-06-12 19:58:49,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:49,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:49,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:49,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:49,649 INFO L87 Difference]: Start difference. First operand 207 states and 461 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) [2021-06-12 19:58:49,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:49,931 INFO L93 Difference]: Finished difference Result 225 states and 497 transitions. [2021-06-12 19:58:49,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:58:49,931 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 [2021-06-12 19:58:49,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:49,932 INFO L225 Difference]: With dead ends: 225 [2021-06-12 19:58:49,932 INFO L226 Difference]: Without dead ends: 225 [2021-06-12 19:58:49,932 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 445.8ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:58:49,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-12 19:58:49,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 209. [2021-06-12 19:58:49,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.235576923076923) internal successors, (465), 208 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) [2021-06-12 19:58:49,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 465 transitions. [2021-06-12 19:58:49,934 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 465 transitions. Word has length 19 [2021-06-12 19:58:49,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:49,934 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 465 transitions. [2021-06-12 19:58:49,934 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) [2021-06-12 19:58:49,934 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 465 transitions. [2021-06-12 19:58:49,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:49,934 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:49,934 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:50,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2706,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:50,135 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:50,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:50,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1229505058, now seen corresponding path program 355 times [2021-06-12 19:58:50,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:50,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002941078] [2021-06-12 19:58:50,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:50,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:50,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:50,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002941078] [2021-06-12 19:58:50,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002941078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:50,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488319144] [2021-06-12 19:58:50,260 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 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 [2021-06-12 19:58:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:50,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:50,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:50,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488319144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:50,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:50,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:50,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481314733] [2021-06-12 19:58:50,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:50,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:50,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:50,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:50,463 INFO L87 Difference]: Start difference. First operand 209 states and 465 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) [2021-06-12 19:58:50,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:50,826 INFO L93 Difference]: Finished difference Result 267 states and 577 transitions. [2021-06-12 19:58:50,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:58:50,826 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 [2021-06-12 19:58:50,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:50,827 INFO L225 Difference]: With dead ends: 267 [2021-06-12 19:58:50,827 INFO L226 Difference]: Without dead ends: 267 [2021-06-12 19:58:50,827 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 469.7ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:58:50,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-06-12 19:58:50,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 210. [2021-06-12 19:58:50,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.248803827751196) internal successors, (470), 209 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:50,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 470 transitions. [2021-06-12 19:58:50,829 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 470 transitions. Word has length 19 [2021-06-12 19:58:50,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:50,829 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 470 transitions. [2021-06-12 19:58:50,829 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) [2021-06-12 19:58:50,829 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 470 transitions. [2021-06-12 19:58:50,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:50,829 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:50,829 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:51,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2714,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:51,030 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:51,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:51,030 INFO L82 PathProgramCache]: Analyzing trace with hash -927514778, now seen corresponding path program 356 times [2021-06-12 19:58:51,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:51,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714987574] [2021-06-12 19:58:51,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:51,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:51,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714987574] [2021-06-12 19:58:51,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714987574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:51,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969802774] [2021-06-12 19:58:51,153 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 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 [2021-06-12 19:58:51,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:51,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:51,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:51,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:51,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969802774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:51,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:51,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:51,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43039231] [2021-06-12 19:58:51,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:51,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:51,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:51,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:51,362 INFO L87 Difference]: Start difference. First operand 210 states and 470 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) [2021-06-12 19:58:51,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:51,603 INFO L93 Difference]: Finished difference Result 241 states and 529 transitions. [2021-06-12 19:58:51,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:58:51,603 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 [2021-06-12 19:58:51,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:51,603 INFO L225 Difference]: With dead ends: 241 [2021-06-12 19:58:51,603 INFO L226 Difference]: Without dead ends: 241 [2021-06-12 19:58:51,603 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 344.0ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:51,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-12 19:58:51,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 206. [2021-06-12 19:58:51,605 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) [2021-06-12 19:58:51,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-06-12 19:58:51,605 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 19 [2021-06-12 19:58:51,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:51,605 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-06-12 19:58:51,605 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) [2021-06-12 19:58:51,605 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-06-12 19:58:51,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:51,606 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:51,606 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:51,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2721 [2021-06-12 19:58:51,806 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:51,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:51,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1294777065, now seen corresponding path program 357 times [2021-06-12 19:58:51,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:51,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672325410] [2021-06-12 19:58:51,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:51,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:51,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672325410] [2021-06-12 19:58:51,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672325410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:51,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100652776] [2021-06-12 19:58:51,908 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 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 [2021-06-12 19:58:51,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:58:51,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:51,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:51,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:52,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100652776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:52,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:52,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:52,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917135505] [2021-06-12 19:58:52,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:52,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:52,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:52,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:52,191 INFO L87 Difference]: Start difference. First operand 206 states and 459 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) [2021-06-12 19:58:52,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:52,530 INFO L93 Difference]: Finished difference Result 237 states and 521 transitions. [2021-06-12 19:58:52,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:58:52,530 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 [2021-06-12 19:58:52,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:52,530 INFO L225 Difference]: With dead ends: 237 [2021-06-12 19:58:52,530 INFO L226 Difference]: Without dead ends: 237 [2021-06-12 19:58:52,530 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 451.0ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:58:52,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-12 19:58:52,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 209. [2021-06-12 19:58:52,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.235576923076923) internal successors, (465), 208 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) [2021-06-12 19:58:52,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 465 transitions. [2021-06-12 19:58:52,532 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 465 transitions. Word has length 19 [2021-06-12 19:58:52,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:52,532 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 465 transitions. [2021-06-12 19:58:52,532 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) [2021-06-12 19:58:52,533 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 465 transitions. [2021-06-12 19:58:52,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:52,533 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:52,533 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:52,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2726,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:52,733 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:52,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1582327300, now seen corresponding path program 358 times [2021-06-12 19:58:52,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:52,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003708112] [2021-06-12 19:58:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:52,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:52,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:52,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003708112] [2021-06-12 19:58:52,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003708112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:52,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942381983] [2021-06-12 19:58:52,832 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 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 [2021-06-12 19:58:52,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:52,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:52,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:58:52,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:53,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942381983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:53,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:53,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:53,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585948311] [2021-06-12 19:58:53,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:53,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:53,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:53,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:53,073 INFO L87 Difference]: Start difference. First operand 209 states and 465 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) [2021-06-12 19:58:53,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:53,595 INFO L93 Difference]: Finished difference Result 278 states and 599 transitions. [2021-06-12 19:58:53,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:58:53,595 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 [2021-06-12 19:58:53,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:53,595 INFO L225 Difference]: With dead ends: 278 [2021-06-12 19:58:53,595 INFO L226 Difference]: Without dead ends: 278 [2021-06-12 19:58:53,596 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 597.4ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:58:53,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-12 19:58:53,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 211. [2021-06-12 19:58:53,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2523809523809524) internal successors, (473), 210 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) [2021-06-12 19:58:53,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 473 transitions. [2021-06-12 19:58:53,598 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 473 transitions. Word has length 19 [2021-06-12 19:58:53,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:53,598 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 473 transitions. [2021-06-12 19:58:53,598 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) [2021-06-12 19:58:53,598 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 473 transitions. [2021-06-12 19:58:53,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:53,598 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:53,598 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:53,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2734 [2021-06-12 19:58:53,799 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:53,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:53,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1884317580, now seen corresponding path program 359 times [2021-06-12 19:58:53,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:53,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955975746] [2021-06-12 19:58:53,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:53,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:53,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:53,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955975746] [2021-06-12 19:58:53,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955975746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:53,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246301783] [2021-06-12 19:58:53,898 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 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 [2021-06-12 19:58:53,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:58:53,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:53,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:53,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:54,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246301783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:54,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:54,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:54,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247583389] [2021-06-12 19:58:54,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:54,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:54,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:54,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:54,143 INFO L87 Difference]: Start difference. First operand 211 states and 473 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) [2021-06-12 19:58:54,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:54,558 INFO L93 Difference]: Finished difference Result 254 states and 557 transitions. [2021-06-12 19:58:54,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:58:54,558 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 [2021-06-12 19:58:54,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:54,559 INFO L225 Difference]: With dead ends: 254 [2021-06-12 19:58:54,559 INFO L226 Difference]: Without dead ends: 254 [2021-06-12 19:58:54,559 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 505.5ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:58:54,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-12 19:58:54,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 210. [2021-06-12 19:58:54,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2535885167464116) internal successors, (471), 209 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) [2021-06-12 19:58:54,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-06-12 19:58:54,561 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-06-12 19:58:54,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:54,561 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-06-12 19:58:54,561 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) [2021-06-12 19:58:54,561 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-06-12 19:58:54,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:54,561 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:54,561 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:54,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2740,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:54,762 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:54,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:54,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1904303450, now seen corresponding path program 360 times [2021-06-12 19:58:54,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:54,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134576058] [2021-06-12 19:58:54,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:54,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:54,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134576058] [2021-06-12 19:58:54,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134576058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:54,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098821323] [2021-06-12 19:58:54,858 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 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 [2021-06-12 19:58:54,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:58:54,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:54,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:54,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:55,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098821323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:55,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:55,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:55,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144143237] [2021-06-12 19:58:55,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:55,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:55,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:55,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:55,064 INFO L87 Difference]: Start difference. First operand 210 states and 471 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) [2021-06-12 19:58:55,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:55,258 INFO L93 Difference]: Finished difference Result 242 states and 531 transitions. [2021-06-12 19:58:55,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:58:55,258 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 [2021-06-12 19:58:55,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:55,259 INFO L225 Difference]: With dead ends: 242 [2021-06-12 19:58:55,259 INFO L226 Difference]: Without dead ends: 242 [2021-06-12 19:58:55,259 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 267.1ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:58:55,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-12 19:58:55,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 206. [2021-06-12 19:58:55,260 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) [2021-06-12 19:58:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-06-12 19:58:55,261 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 19 [2021-06-12 19:58:55,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:55,261 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-06-12 19:58:55,261 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) [2021-06-12 19:58:55,261 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-06-12 19:58:55,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:55,261 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:55,261 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:55,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2745 [2021-06-12 19:58:55,461 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:55,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:55,462 INFO L82 PathProgramCache]: Analyzing trace with hash 2111296839, now seen corresponding path program 361 times [2021-06-12 19:58:55,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:55,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290103499] [2021-06-12 19:58:55,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:55,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:55,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290103499] [2021-06-12 19:58:55,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290103499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:55,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349317490] [2021-06-12 19:58:55,590 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 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 [2021-06-12 19:58:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:55,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:55,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:55,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:55,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349317490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:55,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:55,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:55,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152469347] [2021-06-12 19:58:55,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:55,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:55,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:55,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:55,790 INFO L87 Difference]: Start difference. First operand 206 states and 459 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) [2021-06-12 19:58:55,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:55,919 INFO L93 Difference]: Finished difference Result 236 states and 519 transitions. [2021-06-12 19:58:55,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:58:55,920 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 [2021-06-12 19:58:55,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:55,920 INFO L225 Difference]: With dead ends: 236 [2021-06-12 19:58:55,920 INFO L226 Difference]: Without dead ends: 236 [2021-06-12 19:58:55,920 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 241.9ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:55,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-12 19:58:55,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 209. [2021-06-12 19:58:55,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.235576923076923) internal successors, (465), 208 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) [2021-06-12 19:58:55,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 465 transitions. [2021-06-12 19:58:55,922 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 465 transitions. Word has length 19 [2021-06-12 19:58:55,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:55,922 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 465 transitions. [2021-06-12 19:58:55,922 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) [2021-06-12 19:58:55,922 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 465 transitions. [2021-06-12 19:58:55,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:55,922 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:55,922 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:56,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2750 [2021-06-12 19:58:56,123 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:56,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:56,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1386934705, now seen corresponding path program 362 times [2021-06-12 19:58:56,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:56,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196526807] [2021-06-12 19:58:56,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:56,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:56,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:56,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196526807] [2021-06-12 19:58:56,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196526807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:56,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832424750] [2021-06-12 19:58:56,249 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 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 [2021-06-12 19:58:56,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:56,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:56,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:56,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:56,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832424750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:56,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:56,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:56,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769508756] [2021-06-12 19:58:56,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:56,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:56,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:56,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:56,448 INFO L87 Difference]: Start difference. First operand 209 states and 465 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) [2021-06-12 19:58:56,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:56,651 INFO L93 Difference]: Finished difference Result 256 states and 556 transitions. [2021-06-12 19:58:56,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:58:56,652 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 [2021-06-12 19:58:56,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:56,652 INFO L225 Difference]: With dead ends: 256 [2021-06-12 19:58:56,652 INFO L226 Difference]: Without dead ends: 253 [2021-06-12 19:58:56,652 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 258.0ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:58:56,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-06-12 19:58:56,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 210. [2021-06-12 19:58:56,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2392344497607657) internal successors, (468), 209 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:56,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 468 transitions. [2021-06-12 19:58:56,654 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 468 transitions. Word has length 19 [2021-06-12 19:58:56,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:56,654 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 468 transitions. [2021-06-12 19:58:56,654 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) [2021-06-12 19:58:56,654 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 468 transitions. [2021-06-12 19:58:56,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:56,654 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:56,655 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:56,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2755,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:56,865 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:56,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:56,865 INFO L82 PathProgramCache]: Analyzing trace with hash -259538612, now seen corresponding path program 363 times [2021-06-12 19:58:56,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:56,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668101350] [2021-06-12 19:58:56,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:56,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:56,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:56,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668101350] [2021-06-12 19:58:56,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668101350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:56,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74981115] [2021-06-12 19:58:56,988 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 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 [2021-06-12 19:58:57,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:58:57,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:57,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:57,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:57,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74981115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:57,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:57,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:57,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960409091] [2021-06-12 19:58:57,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:57,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:57,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:57,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:57,224 INFO L87 Difference]: Start difference. First operand 210 states and 468 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) [2021-06-12 19:58:57,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:57,361 INFO L93 Difference]: Finished difference Result 232 states and 509 transitions. [2021-06-12 19:58:57,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:58:57,362 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 [2021-06-12 19:58:57,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:57,362 INFO L225 Difference]: With dead ends: 232 [2021-06-12 19:58:57,362 INFO L226 Difference]: Without dead ends: 230 [2021-06-12 19:58:57,362 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 289.2ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:58:57,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-12 19:58:57,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 208. [2021-06-12 19:58:57,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.236714975845411) internal successors, (463), 207 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:57,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-06-12 19:58:57,364 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-06-12 19:58:57,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:57,364 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-06-12 19:58:57,364 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) [2021-06-12 19:58:57,364 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-06-12 19:58:57,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:57,364 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:57,364 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:57,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2762 [2021-06-12 19:58:57,565 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:57,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:57,565 INFO L82 PathProgramCache]: Analyzing trace with hash -880588439, now seen corresponding path program 364 times [2021-06-12 19:58:57,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:57,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092519339] [2021-06-12 19:58:57,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:57,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:57,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092519339] [2021-06-12 19:58:57,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092519339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:57,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243518417] [2021-06-12 19:58:57,687 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 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 [2021-06-12 19:58:57,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:57,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:57,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:57,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:57,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243518417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:57,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:57,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:57,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345886556] [2021-06-12 19:58:57,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:57,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:57,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:57,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:57,949 INFO L87 Difference]: Start difference. First operand 208 states and 463 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) [2021-06-12 19:58:58,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:58,157 INFO L93 Difference]: Finished difference Result 227 states and 501 transitions. [2021-06-12 19:58:58,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:58:58,157 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 [2021-06-12 19:58:58,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:58,158 INFO L225 Difference]: With dead ends: 227 [2021-06-12 19:58:58,158 INFO L226 Difference]: Without dead ends: 227 [2021-06-12 19:58:58,158 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 363.9ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:58:58,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-12 19:58:58,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 210. [2021-06-12 19:58:58,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2344497607655502) internal successors, (467), 209 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:58,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 467 transitions. [2021-06-12 19:58:58,160 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 467 transitions. Word has length 19 [2021-06-12 19:58:58,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:58,160 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 467 transitions. [2021-06-12 19:58:58,161 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) [2021-06-12 19:58:58,161 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 467 transitions. [2021-06-12 19:58:58,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:58,161 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:58,161 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:58,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2770,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:58,377 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:58,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:58,377 INFO L82 PathProgramCache]: Analyzing trace with hash -593038204, now seen corresponding path program 365 times [2021-06-12 19:58:58,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:58,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511824603] [2021-06-12 19:58:58,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:58,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:58,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511824603] [2021-06-12 19:58:58,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511824603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:58,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924390233] [2021-06-12 19:58:58,505 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 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 [2021-06-12 19:58:58,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:58:58,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:58,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:58,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:58,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924390233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:58,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:58,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:58,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842075147] [2021-06-12 19:58:58,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:58,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:58,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:58,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:58,711 INFO L87 Difference]: Start difference. First operand 210 states and 467 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) [2021-06-12 19:58:59,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:59,048 INFO L93 Difference]: Finished difference Result 261 states and 565 transitions. [2021-06-12 19:58:59,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:58:59,049 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 [2021-06-12 19:58:59,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:59,049 INFO L225 Difference]: With dead ends: 261 [2021-06-12 19:58:59,049 INFO L226 Difference]: Without dead ends: 261 [2021-06-12 19:58:59,049 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 433.8ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:58:59,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-12 19:58:59,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 211. [2021-06-12 19:58:59,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2476190476190476) internal successors, (472), 210 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) [2021-06-12 19:58:59,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 472 transitions. [2021-06-12 19:58:59,051 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 472 transitions. Word has length 19 [2021-06-12 19:58:59,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:59,051 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 472 transitions. [2021-06-12 19:58:59,051 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) [2021-06-12 19:58:59,051 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 472 transitions. [2021-06-12 19:58:59,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:59,051 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:59,051 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:59,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2778 [2021-06-12 19:58:59,252 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:59,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:59,252 INFO L82 PathProgramCache]: Analyzing trace with hash -291047924, now seen corresponding path program 366 times [2021-06-12 19:58:59,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:59,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595302838] [2021-06-12 19:58:59,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:59,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:59,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595302838] [2021-06-12 19:58:59,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595302838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:59,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012484294] [2021-06-12 19:58:59,377 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 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 [2021-06-12 19:58:59,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:58:59,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:59,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:58:59,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:59,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:59,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012484294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:59,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:59,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:58:59,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850613742] [2021-06-12 19:58:59,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:59,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:59,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:59,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:59,581 INFO L87 Difference]: Start difference. First operand 211 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) [2021-06-12 19:58:59,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:59,823 INFO L93 Difference]: Finished difference Result 241 states and 529 transitions. [2021-06-12 19:58:59,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:58:59,823 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 [2021-06-12 19:58:59,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:59,824 INFO L225 Difference]: With dead ends: 241 [2021-06-12 19:58:59,824 INFO L226 Difference]: Without dead ends: 241 [2021-06-12 19:58:59,824 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 360.3ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:58:59,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-12 19:58:59,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 207. [2021-06-12 19:58:59,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.237864077669903) internal successors, (461), 206 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:59,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 461 transitions. [2021-06-12 19:58:59,826 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 461 transitions. Word has length 19 [2021-06-12 19:58:59,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:59,826 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 461 transitions. [2021-06-12 19:58:59,826 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) [2021-06-12 19:58:59,826 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 461 transitions. [2021-06-12 19:58:59,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:58:59,826 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:59,826 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:00,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2785,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:00,026 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:00,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:00,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1931243919, now seen corresponding path program 367 times [2021-06-12 19:59:00,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:00,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364915323] [2021-06-12 19:59:00,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:00,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:00,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:00,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364915323] [2021-06-12 19:59:00,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364915323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:00,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719326438] [2021-06-12 19:59:00,125 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 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 [2021-06-12 19:59:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:00,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:00,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:00,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719326438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:00,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:00,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:00,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078213227] [2021-06-12 19:59:00,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:00,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:00,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:00,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:00,401 INFO L87 Difference]: Start difference. First operand 207 states and 461 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) [2021-06-12 19:59:00,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:00,640 INFO L93 Difference]: Finished difference Result 227 states and 501 transitions. [2021-06-12 19:59:00,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:59:00,640 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 [2021-06-12 19:59:00,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:00,640 INFO L225 Difference]: With dead ends: 227 [2021-06-12 19:59:00,640 INFO L226 Difference]: Without dead ends: 227 [2021-06-12 19:59:00,640 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 395.7ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:59:00,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-12 19:59:00,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 210. [2021-06-12 19:59:00,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2344497607655502) internal successors, (467), 209 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:00,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 467 transitions. [2021-06-12 19:59:00,642 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 467 transitions. Word has length 19 [2021-06-12 19:59:00,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:00,642 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 467 transitions. [2021-06-12 19:59:00,642 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) [2021-06-12 19:59:00,642 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 467 transitions. [2021-06-12 19:59:00,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:00,643 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:00,643 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:00,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2790,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:00,843 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:00,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:00,843 INFO L82 PathProgramCache]: Analyzing trace with hash -2076173142, now seen corresponding path program 368 times [2021-06-12 19:59:00,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:00,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036634010] [2021-06-12 19:59:00,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:00,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:00,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:00,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036634010] [2021-06-12 19:59:00,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036634010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:00,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939671189] [2021-06-12 19:59:00,945 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 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 [2021-06-12 19:59:00,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:00,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:00,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:00,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:01,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939671189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:01,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:01,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:01,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080294656] [2021-06-12 19:59:01,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:01,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:01,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:01,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:01,156 INFO L87 Difference]: Start difference. First operand 210 states and 467 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) [2021-06-12 19:59:01,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:01,709 INFO L93 Difference]: Finished difference Result 280 states and 603 transitions. [2021-06-12 19:59:01,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:59:01,710 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 [2021-06-12 19:59:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:01,710 INFO L225 Difference]: With dead ends: 280 [2021-06-12 19:59:01,710 INFO L226 Difference]: Without dead ends: 280 [2021-06-12 19:59:01,710 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 579.8ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:59:01,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-12 19:59:01,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 212. [2021-06-12 19:59:01,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.251184834123223) internal successors, (475), 211 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:01,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 475 transitions. [2021-06-12 19:59:01,712 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 475 transitions. Word has length 19 [2021-06-12 19:59:01,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:01,712 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 475 transitions. [2021-06-12 19:59:01,712 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) [2021-06-12 19:59:01,712 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 475 transitions. [2021-06-12 19:59:01,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:01,713 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:01,713 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:01,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2798,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:01,929 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:01,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:01,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1774182862, now seen corresponding path program 369 times [2021-06-12 19:59:01,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:01,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80219744] [2021-06-12 19:59:01,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:02,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:02,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80219744] [2021-06-12 19:59:02,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80219744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:02,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577137491] [2021-06-12 19:59:02,030 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 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 [2021-06-12 19:59:02,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:59:02,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:02,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:02,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:02,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:02,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577137491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:02,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:02,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:02,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813421063] [2021-06-12 19:59:02,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:02,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:02,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:02,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:02,247 INFO L87 Difference]: Start difference. First operand 212 states and 475 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) [2021-06-12 19:59:02,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:02,713 INFO L93 Difference]: Finished difference Result 252 states and 553 transitions. [2021-06-12 19:59:02,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:02,713 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 [2021-06-12 19:59:02,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:02,714 INFO L225 Difference]: With dead ends: 252 [2021-06-12 19:59:02,714 INFO L226 Difference]: Without dead ends: 252 [2021-06-12 19:59:02,714 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 544.5ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:59:02,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-12 19:59:02,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 211. [2021-06-12 19:59:02,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2523809523809524) internal successors, (473), 210 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) [2021-06-12 19:59:02,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 473 transitions. [2021-06-12 19:59:02,716 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 473 transitions. Word has length 19 [2021-06-12 19:59:02,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:02,716 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 473 transitions. [2021-06-12 19:59:02,716 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) [2021-06-12 19:59:02,716 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 473 transitions. [2021-06-12 19:59:02,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:02,716 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:02,716 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:02,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2805,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:02,917 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:02,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:02,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1267836596, now seen corresponding path program 370 times [2021-06-12 19:59:02,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:02,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410421116] [2021-06-12 19:59:02,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:03,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:03,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410421116] [2021-06-12 19:59:03,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410421116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:03,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307159406] [2021-06-12 19:59:03,017 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 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 [2021-06-12 19:59:03,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:03,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:03,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:03,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:03,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307159406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:03,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:03,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:03,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870035978] [2021-06-12 19:59:03,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:03,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:03,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:03,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:03,226 INFO L87 Difference]: Start difference. First operand 211 states and 473 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) [2021-06-12 19:59:03,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:03,437 INFO L93 Difference]: Finished difference Result 243 states and 533 transitions. [2021-06-12 19:59:03,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:59:03,438 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 [2021-06-12 19:59:03,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:03,438 INFO L225 Difference]: With dead ends: 243 [2021-06-12 19:59:03,438 INFO L226 Difference]: Without dead ends: 243 [2021-06-12 19:59:03,438 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 288.8ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:03,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-06-12 19:59:03,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 206. [2021-06-12 19:59:03,440 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) [2021-06-12 19:59:03,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-06-12 19:59:03,440 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 19 [2021-06-12 19:59:03,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:03,440 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-06-12 19:59:03,440 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) [2021-06-12 19:59:03,440 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-06-12 19:59:03,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:03,440 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:03,440 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:03,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2810 [2021-06-12 19:59:03,653 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:03,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:03,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1096266199, now seen corresponding path program 371 times [2021-06-12 19:59:03,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:03,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134000277] [2021-06-12 19:59:03,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:03,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:03,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134000277] [2021-06-12 19:59:03,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134000277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:03,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775820636] [2021-06-12 19:59:03,744 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 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 [2021-06-12 19:59:03,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:59:03,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:03,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:03,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:04,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775820636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:04,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:04,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:04,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519677547] [2021-06-12 19:59:04,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:04,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:04,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:04,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:04,050 INFO L87 Difference]: Start difference. First operand 206 states and 459 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) [2021-06-12 19:59:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:04,378 INFO L93 Difference]: Finished difference Result 228 states and 503 transitions. [2021-06-12 19:59:04,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:59:04,379 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 [2021-06-12 19:59:04,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:04,379 INFO L225 Difference]: With dead ends: 228 [2021-06-12 19:59:04,379 INFO L226 Difference]: Without dead ends: 228 [2021-06-12 19:59:04,379 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 516.1ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:59:04,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-12 19:59:04,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 210. [2021-06-12 19:59:04,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2344497607655502) internal successors, (467), 209 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:04,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 467 transitions. [2021-06-12 19:59:04,381 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 467 transitions. Word has length 19 [2021-06-12 19:59:04,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:04,381 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 467 transitions. [2021-06-12 19:59:04,381 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) [2021-06-12 19:59:04,381 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 467 transitions. [2021-06-12 19:59:04,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:04,381 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:04,381 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:04,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2815,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:04,582 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:04,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:04,582 INFO L82 PathProgramCache]: Analyzing trace with hash -808715964, now seen corresponding path program 372 times [2021-06-12 19:59:04,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:04,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605844549] [2021-06-12 19:59:04,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:04,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:04,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:04,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605844549] [2021-06-12 19:59:04,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605844549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:04,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554664823] [2021-06-12 19:59:04,678 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 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 [2021-06-12 19:59:04,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:59:04,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:04,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:04,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:04,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554664823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:04,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:04,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:04,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577743803] [2021-06-12 19:59:04,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:04,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:04,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:04,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:04,910 INFO L87 Difference]: Start difference. First operand 210 states and 467 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) [2021-06-12 19:59:05,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:05,698 INFO L93 Difference]: Finished difference Result 276 states and 595 transitions. [2021-06-12 19:59:05,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:59:05,698 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 [2021-06-12 19:59:05,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:05,698 INFO L225 Difference]: With dead ends: 276 [2021-06-12 19:59:05,698 INFO L226 Difference]: Without dead ends: 276 [2021-06-12 19:59:05,699 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 792.1ms TimeCoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:59:05,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-06-12 19:59:05,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 213. [2021-06-12 19:59:05,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2547169811320753) internal successors, (478), 212 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) [2021-06-12 19:59:05,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 478 transitions. [2021-06-12 19:59:05,701 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 478 transitions. Word has length 19 [2021-06-12 19:59:05,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:05,701 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 478 transitions. [2021-06-12 19:59:05,701 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) [2021-06-12 19:59:05,701 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 478 transitions. [2021-06-12 19:59:05,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:05,701 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:05,701 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:05,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2823 [2021-06-12 19:59:05,902 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:05,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:05,902 INFO L82 PathProgramCache]: Analyzing trace with hash -506725684, now seen corresponding path program 373 times [2021-06-12 19:59:05,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:05,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782165401] [2021-06-12 19:59:05,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:05,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:05,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:05,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782165401] [2021-06-12 19:59:05,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782165401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:05,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602985199] [2021-06-12 19:59:05,998 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 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 [2021-06-12 19:59:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:06,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:06,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:06,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602985199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:06,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:06,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:06,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316286346] [2021-06-12 19:59:06,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:06,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:06,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:06,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:06,225 INFO L87 Difference]: Start difference. First operand 213 states and 478 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) [2021-06-12 19:59:06,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:06,875 INFO L93 Difference]: Finished difference Result 265 states and 579 transitions. [2021-06-12 19:59:06,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:59:06,876 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 [2021-06-12 19:59:06,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:06,876 INFO L225 Difference]: With dead ends: 265 [2021-06-12 19:59:06,876 INFO L226 Difference]: Without dead ends: 265 [2021-06-12 19:59:06,876 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 691.8ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:59:06,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-12 19:59:06,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 212. [2021-06-12 19:59:06,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.255924170616114) internal successors, (476), 211 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:06,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 476 transitions. [2021-06-12 19:59:06,878 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 476 transitions. Word has length 19 [2021-06-12 19:59:06,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:06,878 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 476 transitions. [2021-06-12 19:59:06,878 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) [2021-06-12 19:59:06,878 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 476 transitions. [2021-06-12 19:59:06,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:06,879 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:06,879 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:07,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2830 [2021-06-12 19:59:07,101 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:07,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:07,101 INFO L82 PathProgramCache]: Analyzing trace with hash -379418, now seen corresponding path program 374 times [2021-06-12 19:59:07,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:07,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811248632] [2021-06-12 19:59:07,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:07,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:07,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:07,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811248632] [2021-06-12 19:59:07,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811248632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:07,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174467143] [2021-06-12 19:59:07,193 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 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 [2021-06-12 19:59:07,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:07,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:07,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:07,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:07,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174467143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:07,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:07,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:07,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560347918] [2021-06-12 19:59:07,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:07,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:07,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:07,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:07,415 INFO L87 Difference]: Start difference. First operand 212 states and 476 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) [2021-06-12 19:59:07,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:07,966 INFO L93 Difference]: Finished difference Result 259 states and 568 transitions. [2021-06-12 19:59:07,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:07,967 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 [2021-06-12 19:59:07,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:07,967 INFO L225 Difference]: With dead ends: 259 [2021-06-12 19:59:07,967 INFO L226 Difference]: Without dead ends: 259 [2021-06-12 19:59:07,967 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 639.6ms TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:59:07,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-06-12 19:59:07,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 211. [2021-06-12 19:59:07,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.257142857142857) internal successors, (474), 210 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:07,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 474 transitions. [2021-06-12 19:59:07,969 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 474 transitions. Word has length 19 [2021-06-12 19:59:07,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:07,969 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 474 transitions. [2021-06-12 19:59:07,969 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) [2021-06-12 19:59:07,969 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 474 transitions. [2021-06-12 19:59:07,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:07,969 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:07,970 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:08,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2835,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:08,170 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:08,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:08,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1483514356, now seen corresponding path program 375 times [2021-06-12 19:59:08,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:08,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042237929] [2021-06-12 19:59:08,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:08,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:08,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042237929] [2021-06-12 19:59:08,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042237929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:08,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171428512] [2021-06-12 19:59:08,267 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 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 [2021-06-12 19:59:08,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:59:08,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:08,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:59:08,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:08,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171428512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:08,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:08,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:08,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59037406] [2021-06-12 19:59:08,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:08,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:08,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:08,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:08,503 INFO L87 Difference]: Start difference. First operand 211 states and 474 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) [2021-06-12 19:59:08,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:08,817 INFO L93 Difference]: Finished difference Result 239 states and 525 transitions. [2021-06-12 19:59:08,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:59:08,817 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 [2021-06-12 19:59:08,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:08,818 INFO L225 Difference]: With dead ends: 239 [2021-06-12 19:59:08,818 INFO L226 Difference]: Without dead ends: 239 [2021-06-12 19:59:08,818 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 391.0ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:59:08,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-06-12 19:59:08,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 208. [2021-06-12 19:59:08,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.241545893719807) internal successors, (464), 207 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:08,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 464 transitions. [2021-06-12 19:59:08,820 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 464 transitions. Word has length 19 [2021-06-12 19:59:08,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:08,820 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 464 transitions. [2021-06-12 19:59:08,820 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) [2021-06-12 19:59:08,820 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 464 transitions. [2021-06-12 19:59:08,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:08,821 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:08,821 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:09,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2840 [2021-06-12 19:59:09,029 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:09,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:09,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1717344001, now seen corresponding path program 376 times [2021-06-12 19:59:09,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:09,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284726753] [2021-06-12 19:59:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:09,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:09,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284726753] [2021-06-12 19:59:09,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284726753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:09,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522413622] [2021-06-12 19:59:09,125 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 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 [2021-06-12 19:59:09,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:09,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:09,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:09,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:09,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522413622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:09,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:09,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:09,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097634902] [2021-06-12 19:59:09,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:09,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:09,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:09,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:09,355 INFO L87 Difference]: Start difference. First operand 208 states and 464 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) [2021-06-12 19:59:09,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:09,601 INFO L93 Difference]: Finished difference Result 220 states and 488 transitions. [2021-06-12 19:59:09,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:59:09,601 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 [2021-06-12 19:59:09,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:09,601 INFO L225 Difference]: With dead ends: 220 [2021-06-12 19:59:09,601 INFO L226 Difference]: Without dead ends: 220 [2021-06-12 19:59:09,602 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 330.5ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:59:09,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-12 19:59:09,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 208. [2021-06-12 19:59:09,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.241545893719807) internal successors, (464), 207 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:09,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 464 transitions. [2021-06-12 19:59:09,603 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 464 transitions. Word has length 19 [2021-06-12 19:59:09,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:09,603 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 464 transitions. [2021-06-12 19:59:09,603 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) [2021-06-12 19:59:09,604 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 464 transitions. [2021-06-12 19:59:09,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:09,605 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:09,605 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:09,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2845,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:09,809 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:09,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:09,809 INFO L82 PathProgramCache]: Analyzing trace with hash -558465017, now seen corresponding path program 377 times [2021-06-12 19:59:09,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:09,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629521477] [2021-06-12 19:59:09,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:09,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:09,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629521477] [2021-06-12 19:59:09,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629521477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:09,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319775857] [2021-06-12 19:59:09,892 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 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 [2021-06-12 19:59:09,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:59:09,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:09,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:09,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:10,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319775857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:10,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:10,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:10,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716045666] [2021-06-12 19:59:10,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:10,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:10,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:10,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:10,109 INFO L87 Difference]: Start difference. First operand 208 states and 464 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) [2021-06-12 19:59:10,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:10,528 INFO L93 Difference]: Finished difference Result 236 states and 520 transitions. [2021-06-12 19:59:10,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:10,528 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 [2021-06-12 19:59:10,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:10,529 INFO L225 Difference]: With dead ends: 236 [2021-06-12 19:59:10,529 INFO L226 Difference]: Without dead ends: 236 [2021-06-12 19:59:10,529 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 495.2ms TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:59:10,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-12 19:59:10,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 208. [2021-06-12 19:59:10,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.241545893719807) internal successors, (464), 207 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:10,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 464 transitions. [2021-06-12 19:59:10,538 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 464 transitions. Word has length 19 [2021-06-12 19:59:10,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:10,538 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 464 transitions. [2021-06-12 19:59:10,538 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) [2021-06-12 19:59:10,539 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 464 transitions. [2021-06-12 19:59:10,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:10,539 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:10,539 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:10,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2850 [2021-06-12 19:59:10,741 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:10,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:10,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1629460481, now seen corresponding path program 378 times [2021-06-12 19:59:10,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:10,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803454453] [2021-06-12 19:59:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:10,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:10,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803454453] [2021-06-12 19:59:10,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803454453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:10,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693715690] [2021-06-12 19:59:10,827 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 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 [2021-06-12 19:59:10,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:59:10,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:10,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:10,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:11,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:11,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693715690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:11,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:11,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:11,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042415175] [2021-06-12 19:59:11,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:11,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:11,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:11,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:11,037 INFO L87 Difference]: Start difference. First operand 208 states and 464 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) [2021-06-12 19:59:11,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:11,556 INFO L93 Difference]: Finished difference Result 244 states and 534 transitions. [2021-06-12 19:59:11,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:59:11,556 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 [2021-06-12 19:59:11,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:11,556 INFO L225 Difference]: With dead ends: 244 [2021-06-12 19:59:11,556 INFO L226 Difference]: Without dead ends: 244 [2021-06-12 19:59:11,557 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 545.1ms TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:59:11,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-12 19:59:11,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 209. [2021-06-12 19:59:11,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2403846153846154) internal successors, (466), 208 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) [2021-06-12 19:59:11,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 466 transitions. [2021-06-12 19:59:11,559 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 466 transitions. Word has length 19 [2021-06-12 19:59:11,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:11,559 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 466 transitions. [2021-06-12 19:59:11,559 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) [2021-06-12 19:59:11,559 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 466 transitions. [2021-06-12 19:59:11,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:11,560 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:11,560 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:11,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2855,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:11,765 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:11,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:11,765 INFO L82 PathProgramCache]: Analyzing trace with hash -832724729, now seen corresponding path program 379 times [2021-06-12 19:59:11,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:11,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316090858] [2021-06-12 19:59:11,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:11,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:11,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:11,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316090858] [2021-06-12 19:59:11,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316090858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:11,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202325551] [2021-06-12 19:59:11,845 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 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 [2021-06-12 19:59:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:11,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:11,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:12,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202325551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:12,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:12,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:12,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363179562] [2021-06-12 19:59:12,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:12,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:12,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:12,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:12,056 INFO L87 Difference]: Start difference. First operand 209 states and 466 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) [2021-06-12 19:59:12,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:12,926 INFO L93 Difference]: Finished difference Result 277 states and 586 transitions. [2021-06-12 19:59:12,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:59:12,927 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 [2021-06-12 19:59:12,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:12,927 INFO L225 Difference]: With dead ends: 277 [2021-06-12 19:59:12,927 INFO L226 Difference]: Without dead ends: 277 [2021-06-12 19:59:12,927 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 876.9ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:59:12,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-12 19:59:12,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 210. [2021-06-12 19:59:12,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.248803827751196) internal successors, (470), 209 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:12,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 470 transitions. [2021-06-12 19:59:12,929 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 470 transitions. Word has length 19 [2021-06-12 19:59:12,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:12,929 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 470 transitions. [2021-06-12 19:59:12,929 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) [2021-06-12 19:59:12,930 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 470 transitions. [2021-06-12 19:59:12,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:12,930 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:12,930 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:13,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2860 [2021-06-12 19:59:13,145 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:13,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:13,145 INFO L82 PathProgramCache]: Analyzing trace with hash 294671364, now seen corresponding path program 380 times [2021-06-12 19:59:13,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:13,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165158832] [2021-06-12 19:59:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:13,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:13,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165158832] [2021-06-12 19:59:13,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165158832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:13,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467160146] [2021-06-12 19:59:13,230 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 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 [2021-06-12 19:59:13,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:13,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:13,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:13,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:13,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467160146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:13,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:13,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:13,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98317931] [2021-06-12 19:59:13,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:13,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:13,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:13,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:13,493 INFO L87 Difference]: Start difference. First operand 210 states and 470 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) [2021-06-12 19:59:13,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:13,801 INFO L93 Difference]: Finished difference Result 227 states and 500 transitions. [2021-06-12 19:59:13,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:59:13,801 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 [2021-06-12 19:59:13,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:13,802 INFO L225 Difference]: With dead ends: 227 [2021-06-12 19:59:13,802 INFO L226 Difference]: Without dead ends: 225 [2021-06-12 19:59:13,802 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 439.1ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:59:13,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-12 19:59:13,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 206. [2021-06-12 19:59:13,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2439024390243905) internal successors, (460), 205 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) [2021-06-12 19:59:13,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 460 transitions. [2021-06-12 19:59:13,803 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 460 transitions. Word has length 19 [2021-06-12 19:59:13,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:13,804 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 460 transitions. [2021-06-12 19:59:13,804 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) [2021-06-12 19:59:13,804 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 460 transitions. [2021-06-12 19:59:13,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:13,804 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:13,804 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:14,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2867 [2021-06-12 19:59:14,004 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:14,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:14,005 INFO L82 PathProgramCache]: Analyzing trace with hash 708992161, now seen corresponding path program 381 times [2021-06-12 19:59:14,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:14,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363687067] [2021-06-12 19:59:14,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:14,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:14,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:14,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363687067] [2021-06-12 19:59:14,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363687067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:14,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360641482] [2021-06-12 19:59:14,111 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 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 [2021-06-12 19:59:14,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:59:14,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:14,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:14,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:14,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360641482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:14,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:14,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:14,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780532141] [2021-06-12 19:59:14,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:14,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:14,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:14,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:14,309 INFO L87 Difference]: Start difference. First operand 206 states and 460 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) [2021-06-12 19:59:14,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:14,559 INFO L93 Difference]: Finished difference Result 229 states and 505 transitions. [2021-06-12 19:59:14,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:59:14,559 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 [2021-06-12 19:59:14,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:14,560 INFO L225 Difference]: With dead ends: 229 [2021-06-12 19:59:14,560 INFO L226 Difference]: Without dead ends: 229 [2021-06-12 19:59:14,560 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 269.1ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:14,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-12 19:59:14,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 206. [2021-06-12 19:59:14,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2439024390243905) internal successors, (460), 205 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) [2021-06-12 19:59:14,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 460 transitions. [2021-06-12 19:59:14,561 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 460 transitions. Word has length 19 [2021-06-12 19:59:14,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:14,562 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 460 transitions. [2021-06-12 19:59:14,562 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) [2021-06-12 19:59:14,562 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 460 transitions. [2021-06-12 19:59:14,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:14,562 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:14,562 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:14,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2875,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:14,762 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:14,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:14,762 INFO L82 PathProgramCache]: Analyzing trace with hash -837134980, now seen corresponding path program 382 times [2021-06-12 19:59:14,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:14,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962558902] [2021-06-12 19:59:14,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:14,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:14,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:14,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962558902] [2021-06-12 19:59:14,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962558902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:14,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500743995] [2021-06-12 19:59:14,856 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 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 [2021-06-12 19:59:14,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:14,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:14,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:14,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:15,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500743995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:15,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:15,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:15,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370595831] [2021-06-12 19:59:15,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:15,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:15,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:15,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:15,092 INFO L87 Difference]: Start difference. First operand 206 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) [2021-06-12 19:59:15,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:15,310 INFO L93 Difference]: Finished difference Result 212 states and 467 transitions. [2021-06-12 19:59:15,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:59:15,310 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 [2021-06-12 19:59:15,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:15,311 INFO L225 Difference]: With dead ends: 212 [2021-06-12 19:59:15,311 INFO L226 Difference]: Without dead ends: 206 [2021-06-12 19:59:15,311 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 376.9ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:15,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-06-12 19:59:15,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-06-12 19:59:15,312 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) [2021-06-12 19:59:15,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-06-12 19:59:15,312 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 19 [2021-06-12 19:59:15,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:15,313 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-06-12 19:59:15,313 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) [2021-06-12 19:59:15,313 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-06-12 19:59:15,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:15,313 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:15,313 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:15,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2880,383 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:15,513 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:15,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:15,513 INFO L82 PathProgramCache]: Analyzing trace with hash -362003303, now seen corresponding path program 383 times [2021-06-12 19:59:15,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:15,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065246334] [2021-06-12 19:59:15,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:15,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:15,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065246334] [2021-06-12 19:59:15,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065246334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:15,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988180434] [2021-06-12 19:59:15,608 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 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 [2021-06-12 19:59:15,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:59:15,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:15,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:15,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:15,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988180434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:15,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:15,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:15,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177956422] [2021-06-12 19:59:15,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:15,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:15,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:15,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:15,819 INFO L87 Difference]: Start difference. First operand 206 states and 459 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) [2021-06-12 19:59:16,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:16,232 INFO L93 Difference]: Finished difference Result 239 states and 525 transitions. [2021-06-12 19:59:16,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:16,233 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 [2021-06-12 19:59:16,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:16,233 INFO L225 Difference]: With dead ends: 239 [2021-06-12 19:59:16,233 INFO L226 Difference]: Without dead ends: 239 [2021-06-12 19:59:16,233 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 511.2ms TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:59:16,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-06-12 19:59:16,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 207. [2021-06-12 19:59:16,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.237864077669903) internal successors, (461), 206 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:16,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 461 transitions. [2021-06-12 19:59:16,235 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 461 transitions. Word has length 19 [2021-06-12 19:59:16,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:16,235 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 461 transitions. [2021-06-12 19:59:16,235 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) [2021-06-12 19:59:16,235 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 461 transitions. [2021-06-12 19:59:16,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:16,235 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:16,235 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:16,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2887,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:16,436 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:16,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:16,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1562128542, now seen corresponding path program 384 times [2021-06-12 19:59:16,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:16,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777455589] [2021-06-12 19:59:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:16,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:16,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:16,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777455589] [2021-06-12 19:59:16,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777455589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:16,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149530674] [2021-06-12 19:59:16,529 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 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 [2021-06-12 19:59:16,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:59:16,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:16,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:16,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:16,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149530674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:16,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:16,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:16,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43205105] [2021-06-12 19:59:16,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:16,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:16,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:16,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:16,784 INFO L87 Difference]: Start difference. First operand 207 states and 461 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) [2021-06-12 19:59:17,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:17,006 INFO L93 Difference]: Finished difference Result 220 states and 487 transitions. [2021-06-12 19:59:17,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:59:17,006 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 [2021-06-12 19:59:17,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:17,007 INFO L225 Difference]: With dead ends: 220 [2021-06-12 19:59:17,007 INFO L226 Difference]: Without dead ends: 220 [2021-06-12 19:59:17,007 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 362.1ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:59:17,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-12 19:59:17,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 208. [2021-06-12 19:59:17,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.236714975845411) internal successors, (463), 207 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:17,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-06-12 19:59:17,009 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-06-12 19:59:17,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:17,009 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-06-12 19:59:17,009 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) [2021-06-12 19:59:17,009 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-06-12 19:59:17,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:17,009 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:17,009 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:17,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 385 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2892 [2021-06-12 19:59:17,226 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:17,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:17,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1845138241, now seen corresponding path program 385 times [2021-06-12 19:59:17,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:17,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071149254] [2021-06-12 19:59:17,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:17,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:17,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071149254] [2021-06-12 19:59:17,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071149254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:17,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986067453] [2021-06-12 19:59:17,353 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 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 [2021-06-12 19:59:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:17,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:59:17,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:17,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986067453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:17,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:17,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:17,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346405251] [2021-06-12 19:59:17,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:17,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:17,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:17,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:17,582 INFO L87 Difference]: Start difference. First operand 208 states and 463 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) [2021-06-12 19:59:17,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:17,861 INFO L93 Difference]: Finished difference Result 229 states and 505 transitions. [2021-06-12 19:59:17,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:17,862 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 [2021-06-12 19:59:17,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:17,862 INFO L225 Difference]: With dead ends: 229 [2021-06-12 19:59:17,862 INFO L226 Difference]: Without dead ends: 229 [2021-06-12 19:59:17,862 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 386.8ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:17,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-12 19:59:17,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 208. [2021-06-12 19:59:17,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.236714975845411) internal successors, (463), 207 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:17,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-06-12 19:59:17,864 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-06-12 19:59:17,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:17,864 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-06-12 19:59:17,864 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) [2021-06-12 19:59:17,864 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-06-12 19:59:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:17,864 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:17,864 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:18,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2900,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:18,065 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:18,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:18,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1048402489, now seen corresponding path program 386 times [2021-06-12 19:59:18,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:18,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015044755] [2021-06-12 19:59:18,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:18,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:18,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:18,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015044755] [2021-06-12 19:59:18,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015044755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:18,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117252824] [2021-06-12 19:59:18,181 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 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 [2021-06-12 19:59:18,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:18,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:18,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:18,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:18,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117252824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:18,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:18,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:18,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960560983] [2021-06-12 19:59:18,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:18,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:18,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:18,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:18,386 INFO L87 Difference]: Start difference. First operand 208 states and 463 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) [2021-06-12 19:59:18,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:18,704 INFO L93 Difference]: Finished difference Result 236 states and 519 transitions. [2021-06-12 19:59:18,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:59:18,705 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 [2021-06-12 19:59:18,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:18,705 INFO L225 Difference]: With dead ends: 236 [2021-06-12 19:59:18,705 INFO L226 Difference]: Without dead ends: 236 [2021-06-12 19:59:18,705 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 410.0ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:59:18,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-12 19:59:18,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 208. [2021-06-12 19:59:18,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.236714975845411) internal successors, (463), 207 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:18,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-06-12 19:59:18,707 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-06-12 19:59:18,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:18,707 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-06-12 19:59:18,707 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) [2021-06-12 19:59:18,707 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-06-12 19:59:18,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:18,707 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:18,707 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:18,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2908 [2021-06-12 19:59:18,908 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:18,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:18,908 INFO L82 PathProgramCache]: Analyzing trace with hash -760852254, now seen corresponding path program 387 times [2021-06-12 19:59:18,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:18,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946958332] [2021-06-12 19:59:18,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:19,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:19,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946958332] [2021-06-12 19:59:19,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946958332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:19,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181594200] [2021-06-12 19:59:19,032 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 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 [2021-06-12 19:59:19,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:59:19,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:19,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:19,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:19,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:19,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181594200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:19,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:19,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:19,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055342115] [2021-06-12 19:59:19,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:19,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:19,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:19,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:19,279 INFO L87 Difference]: Start difference. First operand 208 states and 463 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) [2021-06-12 19:59:19,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:19,457 INFO L93 Difference]: Finished difference Result 219 states and 483 transitions. [2021-06-12 19:59:19,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:59:19,458 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 [2021-06-12 19:59:19,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:19,458 INFO L225 Difference]: With dead ends: 219 [2021-06-12 19:59:19,458 INFO L226 Difference]: Without dead ends: 219 [2021-06-12 19:59:19,458 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 336.2ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:19,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-12 19:59:19,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 205. [2021-06-12 19:59:19,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.230392156862745) internal successors, (455), 204 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 455 transitions. [2021-06-12 19:59:19,460 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 455 transitions. Word has length 19 [2021-06-12 19:59:19,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:19,460 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 455 transitions. [2021-06-12 19:59:19,460 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) [2021-06-12 19:59:19,460 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 455 transitions. [2021-06-12 19:59:19,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:19,460 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:19,460 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:19,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2915,388 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:19,661 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:19,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:19,661 INFO L82 PathProgramCache]: Analyzing trace with hash 585339870, now seen corresponding path program 388 times [2021-06-12 19:59:19,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:19,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769975609] [2021-06-12 19:59:19,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:19,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:19,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:19,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769975609] [2021-06-12 19:59:19,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769975609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:19,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086023936] [2021-06-12 19:59:19,777 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 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 [2021-06-12 19:59:19,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:19,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:19,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:19,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:19,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086023936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:19,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:19,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:19,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644842998] [2021-06-12 19:59:19,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:19,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:19,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:19,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:19,971 INFO L87 Difference]: Start difference. First operand 205 states and 455 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) [2021-06-12 19:59:20,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:20,275 INFO L93 Difference]: Finished difference Result 297 states and 613 transitions. [2021-06-12 19:59:20,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:59:20,276 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 [2021-06-12 19:59:20,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:20,276 INFO L225 Difference]: With dead ends: 297 [2021-06-12 19:59:20,276 INFO L226 Difference]: Without dead ends: 297 [2021-06-12 19:59:20,276 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 355.1ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:20,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-12 19:59:20,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 207. [2021-06-12 19:59:20,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.2427184466019416) internal successors, (462), 206 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) [2021-06-12 19:59:20,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 462 transitions. [2021-06-12 19:59:20,278 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 462 transitions. Word has length 19 [2021-06-12 19:59:20,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:20,278 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 462 transitions. [2021-06-12 19:59:20,278 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) [2021-06-12 19:59:20,278 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 462 transitions. [2021-06-12 19:59:20,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:20,279 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:20,279 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:20,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2923,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:20,479 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:20,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:20,479 INFO L82 PathProgramCache]: Analyzing trace with hash 2080425983, now seen corresponding path program 389 times [2021-06-12 19:59:20,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:20,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979078345] [2021-06-12 19:59:20,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:20,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:20,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979078345] [2021-06-12 19:59:20,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979078345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:20,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470825184] [2021-06-12 19:59:20,599 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 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 [2021-06-12 19:59:20,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:59:20,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:20,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:20,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:20,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:20,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470825184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:20,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:20,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:20,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264925203] [2021-06-12 19:59:20,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:20,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:20,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:20,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:20,867 INFO L87 Difference]: Start difference. First operand 207 states and 462 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) [2021-06-12 19:59:21,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:21,027 INFO L93 Difference]: Finished difference Result 237 states and 509 transitions. [2021-06-12 19:59:21,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:21,027 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 [2021-06-12 19:59:21,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:21,028 INFO L225 Difference]: With dead ends: 237 [2021-06-12 19:59:21,028 INFO L226 Difference]: Without dead ends: 231 [2021-06-12 19:59:21,028 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 366.8ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:59:21,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-12 19:59:21,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 215. [2021-06-12 19:59:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2289719626168223) internal successors, (477), 214 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:21,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 477 transitions. [2021-06-12 19:59:21,030 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 477 transitions. Word has length 19 [2021-06-12 19:59:21,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:21,030 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 477 transitions. [2021-06-12 19:59:21,030 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) [2021-06-12 19:59:21,030 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 477 transitions. [2021-06-12 19:59:21,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:21,030 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:21,030 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:21,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2930 [2021-06-12 19:59:21,231 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:21,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:21,231 INFO L82 PathProgramCache]: Analyzing trace with hash 47484292, now seen corresponding path program 390 times [2021-06-12 19:59:21,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:21,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463697976] [2021-06-12 19:59:21,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:21,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:21,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:21,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463697976] [2021-06-12 19:59:21,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463697976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:21,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924047958] [2021-06-12 19:59:21,352 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 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 [2021-06-12 19:59:21,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:59:21,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:21,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:21,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:21,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924047958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:21,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:21,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:21,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419849742] [2021-06-12 19:59:21,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:21,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:21,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:21,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:21,551 INFO L87 Difference]: Start difference. First operand 215 states and 477 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) [2021-06-12 19:59:21,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:21,692 INFO L93 Difference]: Finished difference Result 241 states and 526 transitions. [2021-06-12 19:59:21,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:59:21,692 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 [2021-06-12 19:59:21,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:21,692 INFO L225 Difference]: With dead ends: 241 [2021-06-12 19:59:21,692 INFO L226 Difference]: Without dead ends: 241 [2021-06-12 19:59:21,692 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 231.8ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:21,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-12 19:59:21,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 213. [2021-06-12 19:59:21,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2169811320754715) internal successors, (470), 212 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:21,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 470 transitions. [2021-06-12 19:59:21,694 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 470 transitions. Word has length 19 [2021-06-12 19:59:21,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:21,694 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 470 transitions. [2021-06-12 19:59:21,694 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) [2021-06-12 19:59:21,694 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 470 transitions. [2021-06-12 19:59:21,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:21,695 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:21,695 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:21,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2938,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:21,895 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:21,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:21,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1345459015, now seen corresponding path program 391 times [2021-06-12 19:59:21,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:21,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354303373] [2021-06-12 19:59:21,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:21,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:21,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354303373] [2021-06-12 19:59:21,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354303373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:21,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105054727] [2021-06-12 19:59:21,992 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 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 [2021-06-12 19:59:22,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:22,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:22,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:22,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105054727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:22,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:22,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:22,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23476570] [2021-06-12 19:59:22,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:22,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:22,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:22,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:22,194 INFO L87 Difference]: Start difference. First operand 213 states and 470 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) [2021-06-12 19:59:22,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:22,415 INFO L93 Difference]: Finished difference Result 234 states and 512 transitions. [2021-06-12 19:59:22,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:59:22,416 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 [2021-06-12 19:59:22,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:22,416 INFO L225 Difference]: With dead ends: 234 [2021-06-12 19:59:22,416 INFO L226 Difference]: Without dead ends: 234 [2021-06-12 19:59:22,416 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 262.4ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:22,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-12 19:59:22,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 213. [2021-06-12 19:59:22,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2169811320754715) internal successors, (470), 212 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:22,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 470 transitions. [2021-06-12 19:59:22,418 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 470 transitions. Word has length 19 [2021-06-12 19:59:22,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:22,418 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 470 transitions. [2021-06-12 19:59:22,418 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) [2021-06-12 19:59:22,418 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 470 transitions. [2021-06-12 19:59:22,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:22,418 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:22,418 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:22,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2943 [2021-06-12 19:59:22,619 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:22,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:22,619 INFO L82 PathProgramCache]: Analyzing trace with hash 274463551, now seen corresponding path program 392 times [2021-06-12 19:59:22,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:22,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333250466] [2021-06-12 19:59:22,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:22,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:22,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333250466] [2021-06-12 19:59:22,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333250466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:22,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461813942] [2021-06-12 19:59:22,721 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 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 [2021-06-12 19:59:22,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:22,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:22,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:22,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:22,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:22,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461813942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:22,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:22,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:22,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614333438] [2021-06-12 19:59:22,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:22,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:22,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:22,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:22,930 INFO L87 Difference]: Start difference. First operand 213 states and 470 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) [2021-06-12 19:59:23,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:23,357 INFO L93 Difference]: Finished difference Result 246 states and 536 transitions. [2021-06-12 19:59:23,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:23,357 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 [2021-06-12 19:59:23,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:23,357 INFO L225 Difference]: With dead ends: 246 [2021-06-12 19:59:23,357 INFO L226 Difference]: Without dead ends: 246 [2021-06-12 19:59:23,358 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 488.9ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:59:23,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-12 19:59:23,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 214. [2021-06-12 19:59:23,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.215962441314554) internal successors, (472), 213 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) [2021-06-12 19:59:23,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 472 transitions. [2021-06-12 19:59:23,359 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 472 transitions. Word has length 19 [2021-06-12 19:59:23,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:23,360 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 472 transitions. [2021-06-12 19:59:23,360 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) [2021-06-12 19:59:23,360 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 472 transitions. [2021-06-12 19:59:23,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:23,360 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:23,360 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:23,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2948,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:23,560 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:23,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:23,560 INFO L82 PathProgramCache]: Analyzing trace with hash -2096371900, now seen corresponding path program 393 times [2021-06-12 19:59:23,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:23,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896428588] [2021-06-12 19:59:23,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:23,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:23,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:23,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896428588] [2021-06-12 19:59:23,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896428588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:23,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425839899] [2021-06-12 19:59:23,658 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 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 [2021-06-12 19:59:23,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:59:23,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:23,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:59:23,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:23,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:23,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425839899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:23,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:23,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:23,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446281187] [2021-06-12 19:59:23,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:23,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:23,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:23,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:23,923 INFO L87 Difference]: Start difference. First operand 214 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) [2021-06-12 19:59:24,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:24,172 INFO L93 Difference]: Finished difference Result 227 states and 498 transitions. [2021-06-12 19:59:24,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:59:24,172 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 [2021-06-12 19:59:24,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:24,172 INFO L225 Difference]: With dead ends: 227 [2021-06-12 19:59:24,172 INFO L226 Difference]: Without dead ends: 227 [2021-06-12 19:59:24,172 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 394.8ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:24,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-12 19:59:24,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 212. [2021-06-12 19:59:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2180094786729856) internal successors, (468), 211 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:24,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 468 transitions. [2021-06-12 19:59:24,174 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 468 transitions. Word has length 19 [2021-06-12 19:59:24,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:24,174 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 468 transitions. [2021-06-12 19:59:24,174 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) [2021-06-12 19:59:24,174 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 468 transitions. [2021-06-12 19:59:24,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:24,174 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:24,174 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:24,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2953 [2021-06-12 19:59:24,375 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:24,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:24,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1208671387, now seen corresponding path program 394 times [2021-06-12 19:59:24,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:24,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32531817] [2021-06-12 19:59:24,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:24,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:24,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32531817] [2021-06-12 19:59:24,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32531817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:24,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34005706] [2021-06-12 19:59:24,496 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 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 [2021-06-12 19:59:24,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:24,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:24,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:24,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:24,694 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:24,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34005706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:24,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:24,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:24,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962795361] [2021-06-12 19:59:24,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:24,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:24,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:24,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:24,695 INFO L87 Difference]: Start difference. First operand 212 states and 468 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) [2021-06-12 19:59:24,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:24,926 INFO L93 Difference]: Finished difference Result 235 states and 514 transitions. [2021-06-12 19:59:24,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:59:24,926 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 [2021-06-12 19:59:24,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:24,926 INFO L225 Difference]: With dead ends: 235 [2021-06-12 19:59:24,926 INFO L226 Difference]: Without dead ends: 235 [2021-06-12 19:59:24,926 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 333.2ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:59:24,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-12 19:59:24,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 213. [2021-06-12 19:59:24,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2169811320754715) internal successors, (470), 212 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:24,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 470 transitions. [2021-06-12 19:59:24,928 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 470 transitions. Word has length 19 [2021-06-12 19:59:24,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:24,928 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 470 transitions. [2021-06-12 19:59:24,928 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) [2021-06-12 19:59:24,928 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 470 transitions. [2021-06-12 19:59:24,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:24,929 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:24,929 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:25,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2962,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:25,129 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:25,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:25,129 INFO L82 PathProgramCache]: Analyzing trace with hash -411935635, now seen corresponding path program 395 times [2021-06-12 19:59:25,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:25,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938498880] [2021-06-12 19:59:25,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:25,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:25,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:25,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938498880] [2021-06-12 19:59:25,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938498880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:25,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880664996] [2021-06-12 19:59:25,271 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 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 [2021-06-12 19:59:25,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:59:25,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:25,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:25,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:25,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880664996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:25,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:25,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:25,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308150000] [2021-06-12 19:59:25,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:25,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:25,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:25,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:25,472 INFO L87 Difference]: Start difference. First operand 213 states and 470 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) [2021-06-12 19:59:25,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:25,795 INFO L93 Difference]: Finished difference Result 248 states and 540 transitions. [2021-06-12 19:59:25,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:59:25,796 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 [2021-06-12 19:59:25,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:25,796 INFO L225 Difference]: With dead ends: 248 [2021-06-12 19:59:25,796 INFO L226 Difference]: Without dead ends: 248 [2021-06-12 19:59:25,796 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 463.4ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:59:25,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-12 19:59:25,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 214. [2021-06-12 19:59:25,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.215962441314554) internal successors, (472), 213 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) [2021-06-12 19:59:25,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 472 transitions. [2021-06-12 19:59:25,798 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 472 transitions. Word has length 19 [2021-06-12 19:59:25,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:25,798 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 472 transitions. [2021-06-12 19:59:25,798 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) [2021-06-12 19:59:25,798 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 472 transitions. [2021-06-12 19:59:25,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:25,798 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:25,798 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:25,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2967,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:25,999 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:25,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:25,999 INFO L82 PathProgramCache]: Analyzing trace with hash -124385400, now seen corresponding path program 396 times [2021-06-12 19:59:25,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:25,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326418337] [2021-06-12 19:59:25,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:26,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:26,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:26,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326418337] [2021-06-12 19:59:26,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326418337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:26,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356880328] [2021-06-12 19:59:26,118 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 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 [2021-06-12 19:59:26,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:59:26,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:26,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:26,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:26,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356880328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:26,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:26,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:26,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103486541] [2021-06-12 19:59:26,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:26,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:26,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:26,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:26,362 INFO L87 Difference]: Start difference. First operand 214 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) [2021-06-12 19:59:26,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:26,576 INFO L93 Difference]: Finished difference Result 228 states and 502 transitions. [2021-06-12 19:59:26,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:59:26,577 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 [2021-06-12 19:59:26,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:26,577 INFO L225 Difference]: With dead ends: 228 [2021-06-12 19:59:26,577 INFO L226 Difference]: Without dead ends: 228 [2021-06-12 19:59:26,577 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 410.4ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:26,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-12 19:59:26,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 212. [2021-06-12 19:59:26,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2180094786729856) internal successors, (468), 211 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:26,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 468 transitions. [2021-06-12 19:59:26,579 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 468 transitions. Word has length 19 [2021-06-12 19:59:26,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:26,579 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 468 transitions. [2021-06-12 19:59:26,579 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) [2021-06-12 19:59:26,579 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 468 transitions. [2021-06-12 19:59:26,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:26,579 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:26,579 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:26,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2974 [2021-06-12 19:59:26,780 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:26,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:26,780 INFO L82 PathProgramCache]: Analyzing trace with hash -745435227, now seen corresponding path program 397 times [2021-06-12 19:59:26,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:26,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507330555] [2021-06-12 19:59:26,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:26,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:26,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507330555] [2021-06-12 19:59:26,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507330555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:26,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115736850] [2021-06-12 19:59:26,897 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 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 [2021-06-12 19:59:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:26,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:26,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:27,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115736850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:27,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:27,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:27,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819147527] [2021-06-12 19:59:27,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:27,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:27,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:27,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:27,157 INFO L87 Difference]: Start difference. First operand 212 states and 468 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) [2021-06-12 19:59:27,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:27,469 INFO L93 Difference]: Finished difference Result 240 states and 513 transitions. [2021-06-12 19:59:27,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:59:27,469 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 [2021-06-12 19:59:27,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:27,469 INFO L225 Difference]: With dead ends: 240 [2021-06-12 19:59:27,470 INFO L226 Difference]: Without dead ends: 240 [2021-06-12 19:59:27,470 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 420.0ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:59:27,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-12 19:59:27,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 213. [2021-06-12 19:59:27,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.202830188679245) internal successors, (467), 212 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:27,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 467 transitions. [2021-06-12 19:59:27,471 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 467 transitions. Word has length 19 [2021-06-12 19:59:27,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:27,472 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 467 transitions. [2021-06-12 19:59:27,472 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) [2021-06-12 19:59:27,472 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 467 transitions. [2021-06-12 19:59:27,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:27,472 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:27,472 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:27,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2982 [2021-06-12 19:59:27,672 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:27,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:27,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1221806724, now seen corresponding path program 398 times [2021-06-12 19:59:27,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:27,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549844409] [2021-06-12 19:59:27,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:27,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:27,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549844409] [2021-06-12 19:59:27,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549844409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:27,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766074320] [2021-06-12 19:59:27,799 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 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 [2021-06-12 19:59:27,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:27,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:27,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:27,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:27,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766074320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:27,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:27,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:27,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370560460] [2021-06-12 19:59:27,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:27,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:27,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:27,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:27,994 INFO L87 Difference]: Start difference. First operand 213 states and 467 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) [2021-06-12 19:59:28,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:28,202 INFO L93 Difference]: Finished difference Result 280 states and 590 transitions. [2021-06-12 19:59:28,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:28,203 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 [2021-06-12 19:59:28,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:28,203 INFO L225 Difference]: With dead ends: 280 [2021-06-12 19:59:28,203 INFO L226 Difference]: Without dead ends: 280 [2021-06-12 19:59:28,203 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 282.0ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:28,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-12 19:59:28,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 215. [2021-06-12 19:59:28,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2149532710280373) internal successors, (474), 214 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:28,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 474 transitions. [2021-06-12 19:59:28,205 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 474 transitions. Word has length 19 [2021-06-12 19:59:28,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:28,205 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 474 transitions. [2021-06-12 19:59:28,205 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) [2021-06-12 19:59:28,205 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 474 transitions. [2021-06-12 19:59:28,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:28,205 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:28,205 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:28,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2990,399 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:28,406 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:28,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:28,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1578074459, now seen corresponding path program 399 times [2021-06-12 19:59:28,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:28,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543821987] [2021-06-12 19:59:28,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:28,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:28,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543821987] [2021-06-12 19:59:28,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543821987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:28,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297727332] [2021-06-12 19:59:28,522 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 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 [2021-06-12 19:59:28,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:59:28,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:28,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:28,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:28,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297727332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:28,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:28,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:28,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605335694] [2021-06-12 19:59:28,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:28,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:28,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:28,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:28,794 INFO L87 Difference]: Start difference. First operand 215 states and 474 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) [2021-06-12 19:59:28,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:28,962 INFO L93 Difference]: Finished difference Result 225 states and 490 transitions. [2021-06-12 19:59:28,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:59:28,963 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 [2021-06-12 19:59:28,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:28,963 INFO L225 Difference]: With dead ends: 225 [2021-06-12 19:59:28,963 INFO L226 Difference]: Without dead ends: 219 [2021-06-12 19:59:28,963 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 341.9ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:28,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-12 19:59:28,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 212. [2021-06-12 19:59:28,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2180094786729856) internal successors, (468), 211 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:28,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 468 transitions. [2021-06-12 19:59:28,965 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 468 transitions. Word has length 19 [2021-06-12 19:59:28,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:28,965 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 468 transitions. [2021-06-12 19:59:28,965 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) [2021-06-12 19:59:28,965 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 468 transitions. [2021-06-12 19:59:28,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:28,965 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:28,965 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:29,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2997 [2021-06-12 19:59:29,166 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:29,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:29,166 INFO L82 PathProgramCache]: Analyzing trace with hash 683951146, now seen corresponding path program 400 times [2021-06-12 19:59:29,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:29,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052923757] [2021-06-12 19:59:29,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:29,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:29,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:29,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:29,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052923757] [2021-06-12 19:59:29,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052923757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:29,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207658599] [2021-06-12 19:59:29,283 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 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 [2021-06-12 19:59:29,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:29,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:29,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:29,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:29,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207658599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:29,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:29,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:29,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268422434] [2021-06-12 19:59:29,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:29,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:29,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:29,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:29,481 INFO L87 Difference]: Start difference. First operand 212 states and 468 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) [2021-06-12 19:59:29,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:29,647 INFO L93 Difference]: Finished difference Result 238 states and 517 transitions. [2021-06-12 19:59:29,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:59:29,648 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 [2021-06-12 19:59:29,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:29,648 INFO L225 Difference]: With dead ends: 238 [2021-06-12 19:59:29,648 INFO L226 Difference]: Without dead ends: 238 [2021-06-12 19:59:29,648 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 234.5ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:29,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-12 19:59:29,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 208. [2021-06-12 19:59:29,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.207729468599034) internal successors, (457), 207 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:29,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 457 transitions. [2021-06-12 19:59:29,650 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 457 transitions. Word has length 19 [2021-06-12 19:59:29,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:29,650 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 457 transitions. [2021-06-12 19:59:29,650 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) [2021-06-12 19:59:29,650 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 457 transitions. [2021-06-12 19:59:29,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:29,650 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:29,650 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:29,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3005,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:29,851 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:29,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:29,851 INFO L82 PathProgramCache]: Analyzing trace with hash 58785791, now seen corresponding path program 401 times [2021-06-12 19:59:29,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:29,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659703502] [2021-06-12 19:59:29,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:29,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:30,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:30,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659703502] [2021-06-12 19:59:30,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659703502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:30,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89978959] [2021-06-12 19:59:30,006 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 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 [2021-06-12 19:59:30,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:59:30,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:30,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:59:30,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:30,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89978959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:30,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:30,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:30,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748317152] [2021-06-12 19:59:30,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:30,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:30,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:30,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:30,264 INFO L87 Difference]: Start difference. First operand 208 states and 457 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) [2021-06-12 19:59:30,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:30,444 INFO L93 Difference]: Finished difference Result 236 states and 513 transitions. [2021-06-12 19:59:30,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:59:30,445 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 [2021-06-12 19:59:30,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:30,445 INFO L225 Difference]: With dead ends: 236 [2021-06-12 19:59:30,445 INFO L226 Difference]: Without dead ends: 236 [2021-06-12 19:59:30,445 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 350.5ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:30,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-12 19:59:30,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 208. [2021-06-12 19:59:30,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.207729468599034) internal successors, (457), 207 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:30,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 457 transitions. [2021-06-12 19:59:30,447 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 457 transitions. Word has length 19 [2021-06-12 19:59:30,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:30,447 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 457 transitions. [2021-06-12 19:59:30,447 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) [2021-06-12 19:59:30,447 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 457 transitions. [2021-06-12 19:59:30,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:30,447 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:30,447 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:30,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3010 [2021-06-12 19:59:30,648 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:30,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:30,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1982917636, now seen corresponding path program 402 times [2021-06-12 19:59:30,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:30,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516027322] [2021-06-12 19:59:30,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:30,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:30,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516027322] [2021-06-12 19:59:30,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516027322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:30,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662178915] [2021-06-12 19:59:30,789 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 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 [2021-06-12 19:59:30,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:59:30,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:30,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:59:30,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:31,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662178915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:31,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:31,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:31,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463385583] [2021-06-12 19:59:31,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:31,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:31,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:31,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:31,072 INFO L87 Difference]: Start difference. First operand 208 states and 457 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) [2021-06-12 19:59:31,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:31,691 INFO L93 Difference]: Finished difference Result 317 states and 654 transitions. [2021-06-12 19:59:31,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:59:31,691 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 [2021-06-12 19:59:31,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:31,692 INFO L225 Difference]: With dead ends: 317 [2021-06-12 19:59:31,692 INFO L226 Difference]: Without dead ends: 317 [2021-06-12 19:59:31,692 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 705.5ms TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:59:31,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-12 19:59:31,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 210. [2021-06-12 19:59:31,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.229665071770335) internal successors, (466), 209 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) [2021-06-12 19:59:31,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 466 transitions. [2021-06-12 19:59:31,694 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 466 transitions. Word has length 19 [2021-06-12 19:59:31,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:31,694 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 466 transitions. [2021-06-12 19:59:31,694 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) [2021-06-12 19:59:31,694 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 466 transitions. [2021-06-12 19:59:31,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:31,694 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:31,694 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:31,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3014,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:31,895 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:31,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:31,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1154672572, now seen corresponding path program 403 times [2021-06-12 19:59:31,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:31,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057238230] [2021-06-12 19:59:31,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:32,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:32,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057238230] [2021-06-12 19:59:32,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057238230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:32,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316265103] [2021-06-12 19:59:32,012 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 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 [2021-06-12 19:59:32,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:32,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:59:32,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:32,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:32,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316265103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:32,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:32,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:32,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840001150] [2021-06-12 19:59:32,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:32,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:32,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:32,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:32,275 INFO L87 Difference]: Start difference. First operand 210 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) [2021-06-12 19:59:32,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:32,684 INFO L93 Difference]: Finished difference Result 255 states and 545 transitions. [2021-06-12 19:59:32,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:59:32,684 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 [2021-06-12 19:59:32,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:32,684 INFO L225 Difference]: With dead ends: 255 [2021-06-12 19:59:32,684 INFO L226 Difference]: Without dead ends: 253 [2021-06-12 19:59:32,684 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 508.1ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:59:32,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-06-12 19:59:32,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 210. [2021-06-12 19:59:32,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.22488038277512) internal successors, (465), 209 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) [2021-06-12 19:59:32,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 465 transitions. [2021-06-12 19:59:32,686 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 465 transitions. Word has length 19 [2021-06-12 19:59:32,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:32,686 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 465 transitions. [2021-06-12 19:59:32,686 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) [2021-06-12 19:59:32,686 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 465 transitions. [2021-06-12 19:59:32,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:32,687 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:32,687 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:32,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3021 [2021-06-12 19:59:32,887 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:32,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:32,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1805703394, now seen corresponding path program 404 times [2021-06-12 19:59:32,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:32,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505649547] [2021-06-12 19:59:32,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:32,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:33,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:33,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505649547] [2021-06-12 19:59:33,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505649547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:33,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672269607] [2021-06-12 19:59:33,009 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 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 [2021-06-12 19:59:33,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:33,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:33,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:33,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:33,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672269607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:33,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:33,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:33,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493876020] [2021-06-12 19:59:33,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:33,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:33,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:33,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:33,213 INFO L87 Difference]: Start difference. First operand 210 states and 465 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) [2021-06-12 19:59:33,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:33,632 INFO L93 Difference]: Finished difference Result 265 states and 565 transitions. [2021-06-12 19:59:33,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:59:33,632 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 [2021-06-12 19:59:33,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:33,632 INFO L225 Difference]: With dead ends: 265 [2021-06-12 19:59:33,632 INFO L226 Difference]: Without dead ends: 265 [2021-06-12 19:59:33,632 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 482.6ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:59:33,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-12 19:59:33,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 209. [2021-06-12 19:59:33,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2163461538461537) internal successors, (461), 208 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:33,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 461 transitions. [2021-06-12 19:59:33,634 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 461 transitions. Word has length 19 [2021-06-12 19:59:33,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:33,634 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 461 transitions. [2021-06-12 19:59:33,634 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) [2021-06-12 19:59:33,634 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 461 transitions. [2021-06-12 19:59:33,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:33,635 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:33,635 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:33,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3028 [2021-06-12 19:59:33,835 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:33,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:33,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1951408324, now seen corresponding path program 405 times [2021-06-12 19:59:33,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:33,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996118431] [2021-06-12 19:59:33,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:33,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:33,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:33,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996118431] [2021-06-12 19:59:33,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996118431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:33,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558760845] [2021-06-12 19:59:33,953 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 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 [2021-06-12 19:59:33,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:59:33,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:33,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:33,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:34,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558760845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:34,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:34,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:34,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746162958] [2021-06-12 19:59:34,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:34,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:34,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:34,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:34,157 INFO L87 Difference]: Start difference. First operand 209 states and 461 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) [2021-06-12 19:59:34,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:34,399 INFO L93 Difference]: Finished difference Result 237 states and 514 transitions. [2021-06-12 19:59:34,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:34,399 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 [2021-06-12 19:59:34,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:34,400 INFO L225 Difference]: With dead ends: 237 [2021-06-12 19:59:34,400 INFO L226 Difference]: Without dead ends: 237 [2021-06-12 19:59:34,400 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 302.4ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:34,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-12 19:59:34,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 207. [2021-06-12 19:59:34,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.203883495145631) internal successors, (454), 206 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:34,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 454 transitions. [2021-06-12 19:59:34,402 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 454 transitions. Word has length 19 [2021-06-12 19:59:34,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:34,402 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 454 transitions. [2021-06-12 19:59:34,403 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) [2021-06-12 19:59:34,403 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 454 transitions. [2021-06-12 19:59:34,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:34,403 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:34,403 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:34,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3035,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:34,619 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:34,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:34,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1006128964, now seen corresponding path program 406 times [2021-06-12 19:59:34,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:34,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170161754] [2021-06-12 19:59:34,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:34,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:34,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170161754] [2021-06-12 19:59:34,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170161754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:34,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886956039] [2021-06-12 19:59:34,722 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 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 [2021-06-12 19:59:34,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:34,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:34,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:34,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:34,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:34,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886956039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:34,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:34,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:34,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588278873] [2021-06-12 19:59:34,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:34,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:34,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:34,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:34,934 INFO L87 Difference]: Start difference. First operand 207 states and 454 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) [2021-06-12 19:59:35,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:35,479 INFO L93 Difference]: Finished difference Result 294 states and 611 transitions. [2021-06-12 19:59:35,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:59:35,479 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 [2021-06-12 19:59:35,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:35,480 INFO L225 Difference]: With dead ends: 294 [2021-06-12 19:59:35,480 INFO L226 Difference]: Without dead ends: 294 [2021-06-12 19:59:35,480 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 586.8ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:59:35,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-12 19:59:35,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 209. [2021-06-12 19:59:35,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2211538461538463) internal successors, (462), 208 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) [2021-06-12 19:59:35,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 462 transitions. [2021-06-12 19:59:35,482 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 462 transitions. Word has length 19 [2021-06-12 19:59:35,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:35,482 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 462 transitions. [2021-06-12 19:59:35,482 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) [2021-06-12 19:59:35,482 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 462 transitions. [2021-06-12 19:59:35,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:35,482 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:35,482 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:35,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3040 [2021-06-12 19:59:35,682 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:35,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:35,683 INFO L82 PathProgramCache]: Analyzing trace with hash 468273386, now seen corresponding path program 407 times [2021-06-12 19:59:35,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:35,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381142515] [2021-06-12 19:59:35,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:35,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:35,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:35,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:35,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381142515] [2021-06-12 19:59:35,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381142515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:35,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257047377] [2021-06-12 19:59:35,785 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 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 [2021-06-12 19:59:35,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:59:35,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:35,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:59:35,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:35,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257047377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:35,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:35,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:35,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497348894] [2021-06-12 19:59:35,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:35,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:35,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:35,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:35,998 INFO L87 Difference]: Start difference. First operand 209 states and 462 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) [2021-06-12 19:59:36,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:36,373 INFO L93 Difference]: Finished difference Result 247 states and 536 transitions. [2021-06-12 19:59:36,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:36,373 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 [2021-06-12 19:59:36,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:36,374 INFO L225 Difference]: With dead ends: 247 [2021-06-12 19:59:36,374 INFO L226 Difference]: Without dead ends: 247 [2021-06-12 19:59:36,374 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 447.3ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:59:36,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-12 19:59:36,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 208. [2021-06-12 19:59:36,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.2222222222222223) internal successors, (460), 207 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) [2021-06-12 19:59:36,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 460 transitions. [2021-06-12 19:59:36,375 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 460 transitions. Word has length 19 [2021-06-12 19:59:36,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:36,376 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 460 transitions. [2021-06-12 19:59:36,376 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) [2021-06-12 19:59:36,376 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 460 transitions. [2021-06-12 19:59:36,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:36,376 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:36,376 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:36,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3047,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:36,576 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:36,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:36,577 INFO L82 PathProgramCache]: Analyzing trace with hash 974619652, now seen corresponding path program 408 times [2021-06-12 19:59:36,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:36,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806056729] [2021-06-12 19:59:36,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:36,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:36,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806056729] [2021-06-12 19:59:36,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806056729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:36,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361350510] [2021-06-12 19:59:36,676 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 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 [2021-06-12 19:59:36,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:59:36,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:36,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:59:36,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:36,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:36,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361350510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:36,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:36,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:36,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527851144] [2021-06-12 19:59:36,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:36,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:36,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:36,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:36,933 INFO L87 Difference]: Start difference. First operand 208 states and 460 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) [2021-06-12 19:59:37,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:37,133 INFO L93 Difference]: Finished difference Result 241 states and 522 transitions. [2021-06-12 19:59:37,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:37,133 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 [2021-06-12 19:59:37,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:37,134 INFO L225 Difference]: With dead ends: 241 [2021-06-12 19:59:37,134 INFO L226 Difference]: Without dead ends: 241 [2021-06-12 19:59:37,134 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 270.5ms TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:37,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-12 19:59:37,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 205. [2021-06-12 19:59:37,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2058823529411766) internal successors, (450), 204 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) [2021-06-12 19:59:37,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 450 transitions. [2021-06-12 19:59:37,136 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 450 transitions. Word has length 19 [2021-06-12 19:59:37,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:37,136 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 450 transitions. [2021-06-12 19:59:37,136 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) [2021-06-12 19:59:37,136 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 450 transitions. [2021-06-12 19:59:37,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:37,136 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:37,136 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:37,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3052 [2021-06-12 19:59:37,336 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:37,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:37,337 INFO L82 PathProgramCache]: Analyzing trace with hash -398904991, now seen corresponding path program 409 times [2021-06-12 19:59:37,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:37,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092069587] [2021-06-12 19:59:37,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:37,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:37,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092069587] [2021-06-12 19:59:37,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092069587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:37,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312100489] [2021-06-12 19:59:37,440 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 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 [2021-06-12 19:59:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:37,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:37,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:37,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312100489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:37,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:37,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:37,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250539568] [2021-06-12 19:59:37,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:37,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:37,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:37,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:37,652 INFO L87 Difference]: Start difference. First operand 205 states and 450 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) [2021-06-12 19:59:37,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:37,911 INFO L93 Difference]: Finished difference Result 226 states and 492 transitions. [2021-06-12 19:59:37,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:37,912 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 [2021-06-12 19:59:37,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:37,912 INFO L225 Difference]: With dead ends: 226 [2021-06-12 19:59:37,912 INFO L226 Difference]: Without dead ends: 226 [2021-06-12 19:59:37,912 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 296.8ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:59:37,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-12 19:59:37,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 205. [2021-06-12 19:59:37,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2058823529411766) internal successors, (450), 204 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) [2021-06-12 19:59:37,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 450 transitions. [2021-06-12 19:59:37,914 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 450 transitions. Word has length 19 [2021-06-12 19:59:37,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:37,914 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 450 transitions. [2021-06-12 19:59:37,914 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) [2021-06-12 19:59:37,914 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 450 transitions. [2021-06-12 19:59:37,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:37,914 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:37,914 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:38,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3057,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:38,115 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:38,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:38,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1469900455, now seen corresponding path program 410 times [2021-06-12 19:59:38,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:38,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857849847] [2021-06-12 19:59:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:38,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:38,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857849847] [2021-06-12 19:59:38,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857849847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:38,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814350635] [2021-06-12 19:59:38,222 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 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 [2021-06-12 19:59:38,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:38,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:38,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:59:38,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:38,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:38,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814350635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:38,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:38,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:38,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541793286] [2021-06-12 19:59:38,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:38,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:38,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:38,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:38,451 INFO L87 Difference]: Start difference. First operand 205 states and 450 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) [2021-06-12 19:59:38,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:38,918 INFO L93 Difference]: Finished difference Result 239 states and 518 transitions. [2021-06-12 19:59:38,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:59:38,918 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 [2021-06-12 19:59:38,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:38,919 INFO L225 Difference]: With dead ends: 239 [2021-06-12 19:59:38,919 INFO L226 Difference]: Without dead ends: 239 [2021-06-12 19:59:38,919 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 513.3ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:59:38,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-06-12 19:59:38,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 205. [2021-06-12 19:59:38,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2058823529411766) internal successors, (450), 204 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) [2021-06-12 19:59:38,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 450 transitions. [2021-06-12 19:59:38,921 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 450 transitions. Word has length 19 [2021-06-12 19:59:38,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:38,921 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 450 transitions. [2021-06-12 19:59:38,921 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) [2021-06-12 19:59:38,921 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 450 transitions. [2021-06-12 19:59:38,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:38,921 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:38,921 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:39,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3062,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:39,121 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:39,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:39,122 INFO L82 PathProgramCache]: Analyzing trace with hash -673164703, now seen corresponding path program 411 times [2021-06-12 19:59:39,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:39,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105555484] [2021-06-12 19:59:39,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:39,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:39,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:39,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105555484] [2021-06-12 19:59:39,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105555484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:39,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102619536] [2021-06-12 19:59:39,221 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 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 [2021-06-12 19:59:39,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:59:39,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:39,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:39,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:39,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102619536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:39,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:39,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:39,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649213452] [2021-06-12 19:59:39,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:39,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:39,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:39,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:39,445 INFO L87 Difference]: Start difference. First operand 205 states and 450 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) [2021-06-12 19:59:39,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:39,973 INFO L93 Difference]: Finished difference Result 247 states and 534 transitions. [2021-06-12 19:59:39,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:59:39,973 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 [2021-06-12 19:59:39,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:39,973 INFO L225 Difference]: With dead ends: 247 [2021-06-12 19:59:39,973 INFO L226 Difference]: Without dead ends: 247 [2021-06-12 19:59:39,974 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 519.3ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:59:39,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-12 19:59:39,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 205. [2021-06-12 19:59:39,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2058823529411766) internal successors, (450), 204 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) [2021-06-12 19:59:39,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 450 transitions. [2021-06-12 19:59:39,975 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 450 transitions. Word has length 19 [2021-06-12 19:59:39,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:39,975 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 450 transitions. [2021-06-12 19:59:39,975 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) [2021-06-12 19:59:39,976 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 450 transitions. [2021-06-12 19:59:39,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:39,976 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:39,976 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:40,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3067 [2021-06-12 19:59:40,176 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:40,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:40,176 INFO L82 PathProgramCache]: Analyzing trace with hash -385614468, now seen corresponding path program 412 times [2021-06-12 19:59:40,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:40,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587125932] [2021-06-12 19:59:40,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:40,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:40,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:40,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587125932] [2021-06-12 19:59:40,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587125932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:40,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144718588] [2021-06-12 19:59:40,272 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 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 [2021-06-12 19:59:40,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:40,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:40,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:40,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:40,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:40,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144718588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:40,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:40,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:40,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459217334] [2021-06-12 19:59:40,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:40,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:40,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:40,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:40,533 INFO L87 Difference]: Start difference. First operand 205 states and 450 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) [2021-06-12 19:59:40,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:40,756 INFO L93 Difference]: Finished difference Result 223 states and 485 transitions. [2021-06-12 19:59:40,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:40,756 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 [2021-06-12 19:59:40,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:40,757 INFO L225 Difference]: With dead ends: 223 [2021-06-12 19:59:40,757 INFO L226 Difference]: Without dead ends: 223 [2021-06-12 19:59:40,757 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 356.4ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:59:40,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-12 19:59:40,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 200. [2021-06-12 19:59:40,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.190954773869347) internal successors, (436), 199 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:40,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 436 transitions. [2021-06-12 19:59:40,759 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 436 transitions. Word has length 19 [2021-06-12 19:59:40,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:40,759 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 436 transitions. [2021-06-12 19:59:40,759 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) [2021-06-12 19:59:40,759 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 436 transitions. [2021-06-12 19:59:40,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:40,759 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:40,759 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:40,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3074,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:40,959 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:40,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:40,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1341931903, now seen corresponding path program 413 times [2021-06-12 19:59:40,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:40,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703902788] [2021-06-12 19:59:40,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:41,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:41,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703902788] [2021-06-12 19:59:41,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703902788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:41,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143702699] [2021-06-12 19:59:41,082 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 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 [2021-06-12 19:59:41,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:59:41,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:41,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:41,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:41,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143702699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:41,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:41,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:41,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543342349] [2021-06-12 19:59:41,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:41,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:41,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:41,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:41,294 INFO L87 Difference]: Start difference. First operand 200 states and 436 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) [2021-06-12 19:59:41,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:41,521 INFO L93 Difference]: Finished difference Result 224 states and 484 transitions. [2021-06-12 19:59:41,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:59:41,521 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 [2021-06-12 19:59:41,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:41,521 INFO L225 Difference]: With dead ends: 224 [2021-06-12 19:59:41,521 INFO L226 Difference]: Without dead ends: 224 [2021-06-12 19:59:41,521 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 346.7ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:59:41,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-12 19:59:41,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 200. [2021-06-12 19:59:41,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.190954773869347) internal successors, (436), 199 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:41,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 436 transitions. [2021-06-12 19:59:41,523 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 436 transitions. Word has length 19 [2021-06-12 19:59:41,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:41,523 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 436 transitions. [2021-06-12 19:59:41,523 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) [2021-06-12 19:59:41,523 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 436 transitions. [2021-06-12 19:59:41,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:41,523 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:41,524 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:41,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3082 [2021-06-12 19:59:41,724 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:41,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:41,724 INFO L82 PathProgramCache]: Analyzing trace with hash 2138667655, now seen corresponding path program 414 times [2021-06-12 19:59:41,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:41,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666962830] [2021-06-12 19:59:41,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:41,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:41,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:41,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666962830] [2021-06-12 19:59:41,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666962830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:41,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855795503] [2021-06-12 19:59:41,853 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 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 [2021-06-12 19:59:41,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:59:41,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:41,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:59:41,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:42,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:42,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855795503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:42,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:42,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:42,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701831333] [2021-06-12 19:59:42,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:42,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:42,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:42,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:42,063 INFO L87 Difference]: Start difference. First operand 200 states and 436 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) [2021-06-12 19:59:42,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:42,468 INFO L93 Difference]: Finished difference Result 241 states and 518 transitions. [2021-06-12 19:59:42,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:59:42,468 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 [2021-06-12 19:59:42,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:42,469 INFO L225 Difference]: With dead ends: 241 [2021-06-12 19:59:42,469 INFO L226 Difference]: Without dead ends: 241 [2021-06-12 19:59:42,469 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 467.8ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:59:42,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-12 19:59:42,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 200. [2021-06-12 19:59:42,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.190954773869347) internal successors, (436), 199 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:42,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 436 transitions. [2021-06-12 19:59:42,470 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 436 transitions. Word has length 19 [2021-06-12 19:59:42,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:42,471 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 436 transitions. [2021-06-12 19:59:42,471 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) [2021-06-12 19:59:42,471 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 436 transitions. [2021-06-12 19:59:42,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:42,471 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:42,471 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:42,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3087 [2021-06-12 19:59:42,671 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:42,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:42,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1868749406, now seen corresponding path program 415 times [2021-06-12 19:59:42,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:42,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068544708] [2021-06-12 19:59:42,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:42,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:42,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:42,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068544708] [2021-06-12 19:59:42,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068544708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:42,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529843439] [2021-06-12 19:59:42,789 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 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 [2021-06-12 19:59:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:42,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:42,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:43,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:43,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529843439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:43,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:43,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:43,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070904381] [2021-06-12 19:59:43,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:43,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:43,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:43,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:43,029 INFO L87 Difference]: Start difference. First operand 200 states and 436 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) [2021-06-12 19:59:43,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:43,312 INFO L93 Difference]: Finished difference Result 221 states and 480 transitions. [2021-06-12 19:59:43,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:43,313 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 [2021-06-12 19:59:43,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:43,313 INFO L225 Difference]: With dead ends: 221 [2021-06-12 19:59:43,313 INFO L226 Difference]: Without dead ends: 221 [2021-06-12 19:59:43,313 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 405.7ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:43,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-12 19:59:43,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 198. [2021-06-12 19:59:43,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1928934010152283) internal successors, (432), 197 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:43,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 432 transitions. [2021-06-12 19:59:43,315 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 432 transitions. Word has length 19 [2021-06-12 19:59:43,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:43,315 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 432 transitions. [2021-06-12 19:59:43,315 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) [2021-06-12 19:59:43,315 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 432 transitions. [2021-06-12 19:59:43,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:43,315 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:43,315 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:43,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3094,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:43,516 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:43,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:43,516 INFO L82 PathProgramCache]: Analyzing trace with hash -522557282, now seen corresponding path program 416 times [2021-06-12 19:59:43,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:43,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484995052] [2021-06-12 19:59:43,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:43,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:43,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:43,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484995052] [2021-06-12 19:59:43,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484995052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:43,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168213637] [2021-06-12 19:59:43,638 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 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 [2021-06-12 19:59:43,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:43,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:43,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:43,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:43,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:43,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168213637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:43,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:43,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:43,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348077513] [2021-06-12 19:59:43,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:43,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:43,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:43,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:43,845 INFO L87 Difference]: Start difference. First operand 198 states and 432 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) [2021-06-12 19:59:44,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:44,150 INFO L93 Difference]: Finished difference Result 255 states and 541 transitions. [2021-06-12 19:59:44,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:59:44,150 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 [2021-06-12 19:59:44,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:44,151 INFO L225 Difference]: With dead ends: 255 [2021-06-12 19:59:44,151 INFO L226 Difference]: Without dead ends: 255 [2021-06-12 19:59:44,151 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 370.9ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:59:44,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-12 19:59:44,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 201. [2021-06-12 19:59:44,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.205) internal successors, (441), 200 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:44,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 441 transitions. [2021-06-12 19:59:44,153 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 441 transitions. Word has length 19 [2021-06-12 19:59:44,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:44,153 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 441 transitions. [2021-06-12 19:59:44,153 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) [2021-06-12 19:59:44,153 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 441 transitions. [2021-06-12 19:59:44,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:44,153 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:44,153 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:44,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3102,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:44,353 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:44,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:44,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1060412860, now seen corresponding path program 417 times [2021-06-12 19:59:44,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:44,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238607646] [2021-06-12 19:59:44,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:44,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:44,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:44,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238607646] [2021-06-12 19:59:44,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238607646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:44,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989201722] [2021-06-12 19:59:44,474 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 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 [2021-06-12 19:59:44,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:59:44,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:44,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:59:44,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:44,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989201722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:44,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:44,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:44,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203442862] [2021-06-12 19:59:44,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:44,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:44,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:44,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:44,695 INFO L87 Difference]: Start difference. First operand 201 states and 441 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) [2021-06-12 19:59:44,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:44,927 INFO L93 Difference]: Finished difference Result 234 states and 504 transitions. [2021-06-12 19:59:44,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:59:44,927 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 [2021-06-12 19:59:44,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:44,928 INFO L225 Difference]: With dead ends: 234 [2021-06-12 19:59:44,928 INFO L226 Difference]: Without dead ends: 234 [2021-06-12 19:59:44,928 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 312.4ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:59:44,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-12 19:59:44,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 196. [2021-06-12 19:59:44,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.194871794871795) internal successors, (428), 195 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:44,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 428 transitions. [2021-06-12 19:59:44,930 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 428 transitions. Word has length 19 [2021-06-12 19:59:44,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:44,930 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 428 transitions. [2021-06-12 19:59:44,930 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) [2021-06-12 19:59:44,930 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 428 transitions. [2021-06-12 19:59:44,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:44,930 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:44,930 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:45,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3109,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:45,130 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:45,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:45,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1685578215, now seen corresponding path program 418 times [2021-06-12 19:59:45,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:45,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903964555] [2021-06-12 19:59:45,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:45,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:45,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:45,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903964555] [2021-06-12 19:59:45,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903964555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:45,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299540227] [2021-06-12 19:59:45,254 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 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 [2021-06-12 19:59:45,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:45,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:45,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:45,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:45,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:45,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299540227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:45,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:45,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:45,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933363888] [2021-06-12 19:59:45,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:45,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:45,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:45,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:45,462 INFO L87 Difference]: Start difference. First operand 196 states and 428 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) [2021-06-12 19:59:45,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:45,679 INFO L93 Difference]: Finished difference Result 221 states and 478 transitions. [2021-06-12 19:59:45,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:45,679 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 [2021-06-12 19:59:45,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:45,680 INFO L225 Difference]: With dead ends: 221 [2021-06-12 19:59:45,680 INFO L226 Difference]: Without dead ends: 221 [2021-06-12 19:59:45,680 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 292.1ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:45,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-12 19:59:45,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 197. [2021-06-12 19:59:45,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.193877551020408) internal successors, (430), 196 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:45,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 430 transitions. [2021-06-12 19:59:45,681 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 430 transitions. Word has length 19 [2021-06-12 19:59:45,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:45,681 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 430 transitions. [2021-06-12 19:59:45,681 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) [2021-06-12 19:59:45,682 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 430 transitions. [2021-06-12 19:59:45,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:45,682 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:45,682 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:45,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3114 [2021-06-12 19:59:45,882 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:45,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:45,882 INFO L82 PathProgramCache]: Analyzing trace with hash -888842463, now seen corresponding path program 419 times [2021-06-12 19:59:45,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:45,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462888068] [2021-06-12 19:59:45,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:46,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:46,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462888068] [2021-06-12 19:59:46,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462888068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:46,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284608350] [2021-06-12 19:59:46,003 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 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 [2021-06-12 19:59:46,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:59:46,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:46,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:46,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:46,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:46,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284608350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:46,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:46,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:46,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878455357] [2021-06-12 19:59:46,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:46,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:46,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:46,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:46,209 INFO L87 Difference]: Start difference. First operand 197 states and 430 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) [2021-06-12 19:59:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:46,379 INFO L93 Difference]: Finished difference Result 240 states and 513 transitions. [2021-06-12 19:59:46,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:46,379 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 [2021-06-12 19:59:46,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:46,380 INFO L225 Difference]: With dead ends: 240 [2021-06-12 19:59:46,380 INFO L226 Difference]: Without dead ends: 237 [2021-06-12 19:59:46,380 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 281.8ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:46,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-12 19:59:46,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 198. [2021-06-12 19:59:46,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.197969543147208) internal successors, (433), 197 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:46,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 433 transitions. [2021-06-12 19:59:46,381 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 433 transitions. Word has length 19 [2021-06-12 19:59:46,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:46,382 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 433 transitions. [2021-06-12 19:59:46,382 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) [2021-06-12 19:59:46,382 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 433 transitions. [2021-06-12 19:59:46,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:46,382 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:46,382 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:46,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3119,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:46,582 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:46,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:46,583 INFO L82 PathProgramCache]: Analyzing trace with hash 238553630, now seen corresponding path program 420 times [2021-06-12 19:59:46,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:46,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103026688] [2021-06-12 19:59:46,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:46,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:46,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103026688] [2021-06-12 19:59:46,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103026688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:46,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450236157] [2021-06-12 19:59:46,703 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 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 [2021-06-12 19:59:46,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:59:46,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:46,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:46,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:46,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450236157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:46,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:46,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:46,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141460317] [2021-06-12 19:59:46,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:46,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:46,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:46,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:46,937 INFO L87 Difference]: Start difference. First operand 198 states and 433 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) [2021-06-12 19:59:47,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:47,100 INFO L93 Difference]: Finished difference Result 215 states and 464 transitions. [2021-06-12 19:59:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:47,100 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 [2021-06-12 19:59:47,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:47,100 INFO L225 Difference]: With dead ends: 215 [2021-06-12 19:59:47,100 INFO L226 Difference]: Without dead ends: 213 [2021-06-12 19:59:47,100 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 297.2ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:47,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-12 19:59:47,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 196. [2021-06-12 19:59:47,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.194871794871795) internal successors, (428), 195 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:47,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 428 transitions. [2021-06-12 19:59:47,102 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 428 transitions. Word has length 19 [2021-06-12 19:59:47,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:47,102 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 428 transitions. [2021-06-12 19:59:47,102 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) [2021-06-12 19:59:47,102 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 428 transitions. [2021-06-12 19:59:47,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:47,102 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:47,102 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:47,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3126,421 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:47,303 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:47,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:47,303 INFO L82 PathProgramCache]: Analyzing trace with hash -382496197, now seen corresponding path program 421 times [2021-06-12 19:59:47,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:47,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056720821] [2021-06-12 19:59:47,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:47,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:47,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:47,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056720821] [2021-06-12 19:59:47,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056720821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:47,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781847089] [2021-06-12 19:59:47,417 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 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 [2021-06-12 19:59:47,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:47,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:47,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:47,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781847089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:47,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:47,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:47,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340391962] [2021-06-12 19:59:47,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:47,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:47,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:47,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:47,685 INFO L87 Difference]: Start difference. First operand 196 states and 428 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) [2021-06-12 19:59:47,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:47,964 INFO L93 Difference]: Finished difference Result 210 states and 456 transitions. [2021-06-12 19:59:47,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:59:47,964 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 [2021-06-12 19:59:47,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:47,964 INFO L225 Difference]: With dead ends: 210 [2021-06-12 19:59:47,964 INFO L226 Difference]: Without dead ends: 210 [2021-06-12 19:59:47,964 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 438.0ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:47,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-12 19:59:47,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 198. [2021-06-12 19:59:47,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1928934010152283) internal successors, (432), 197 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:47,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 432 transitions. [2021-06-12 19:59:47,966 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 432 transitions. Word has length 19 [2021-06-12 19:59:47,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:47,966 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 432 transitions. [2021-06-12 19:59:47,966 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) [2021-06-12 19:59:47,966 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 432 transitions. [2021-06-12 19:59:47,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:47,967 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:47,967 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:48,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3134,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:48,169 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:48,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:48,169 INFO L82 PathProgramCache]: Analyzing trace with hash -94945962, now seen corresponding path program 422 times [2021-06-12 19:59:48,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:48,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747026270] [2021-06-12 19:59:48,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:48,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:48,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:48,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747026270] [2021-06-12 19:59:48,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747026270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:48,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120454604] [2021-06-12 19:59:48,286 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 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 [2021-06-12 19:59:48,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:48,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:48,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:48,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:48,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120454604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:48,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:48,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:48,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561383514] [2021-06-12 19:59:48,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:48,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:48,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:48,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:48,489 INFO L87 Difference]: Start difference. First operand 198 states and 432 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) [2021-06-12 19:59:48,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:48,827 INFO L93 Difference]: Finished difference Result 252 states and 536 transitions. [2021-06-12 19:59:48,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:48,827 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 [2021-06-12 19:59:48,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:48,827 INFO L225 Difference]: With dead ends: 252 [2021-06-12 19:59:48,827 INFO L226 Difference]: Without dead ends: 252 [2021-06-12 19:59:48,827 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 445.1ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:59:48,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-12 19:59:48,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 199. [2021-06-12 19:59:48,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.207070707070707) internal successors, (437), 198 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:48,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 437 transitions. [2021-06-12 19:59:48,833 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 437 transitions. Word has length 19 [2021-06-12 19:59:48,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:48,833 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 437 transitions. [2021-06-12 19:59:48,833 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) [2021-06-12 19:59:48,833 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 437 transitions. [2021-06-12 19:59:48,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:48,833 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:48,833 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:49,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3142 [2021-06-12 19:59:49,033 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:49,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:49,034 INFO L82 PathProgramCache]: Analyzing trace with hash 207044318, now seen corresponding path program 423 times [2021-06-12 19:59:49,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:49,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27554486] [2021-06-12 19:59:49,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:49,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:49,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:49,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27554486] [2021-06-12 19:59:49,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27554486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:49,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756848514] [2021-06-12 19:59:49,163 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 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 [2021-06-12 19:59:49,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:59:49,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:49,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:49,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:49,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:49,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756848514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:49,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:49,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:49,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873009697] [2021-06-12 19:59:49,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:49,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:49,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:49,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:49,370 INFO L87 Difference]: Start difference. First operand 199 states and 437 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) [2021-06-12 19:59:49,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:49,578 INFO L93 Difference]: Finished difference Result 227 states and 490 transitions. [2021-06-12 19:59:49,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:59:49,579 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 [2021-06-12 19:59:49,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:49,579 INFO L225 Difference]: With dead ends: 227 [2021-06-12 19:59:49,579 INFO L226 Difference]: Without dead ends: 227 [2021-06-12 19:59:49,579 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 322.9ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:49,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-12 19:59:49,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 195. [2021-06-12 19:59:49,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.195876288659794) internal successors, (426), 194 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:49,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 426 transitions. [2021-06-12 19:59:49,581 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 426 transitions. Word has length 19 [2021-06-12 19:59:49,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:49,581 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 426 transitions. [2021-06-12 19:59:49,581 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) [2021-06-12 19:59:49,581 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 426 transitions. [2021-06-12 19:59:49,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:49,581 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:49,581 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:49,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3149,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:49,782 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:49,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:49,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1865631135, now seen corresponding path program 424 times [2021-06-12 19:59:49,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:49,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598915035] [2021-06-12 19:59:49,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:49,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:49,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598915035] [2021-06-12 19:59:49,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598915035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:49,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669535316] [2021-06-12 19:59:49,874 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 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 [2021-06-12 19:59:49,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:49,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:49,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:49,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:50,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:50,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669535316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:50,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:50,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:50,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085134001] [2021-06-12 19:59:50,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:50,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:50,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:50,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:50,160 INFO L87 Difference]: Start difference. First operand 195 states and 426 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) [2021-06-12 19:59:50,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:50,411 INFO L93 Difference]: Finished difference Result 214 states and 462 transitions. [2021-06-12 19:59:50,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:59:50,412 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 [2021-06-12 19:59:50,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:50,412 INFO L225 Difference]: With dead ends: 214 [2021-06-12 19:59:50,412 INFO L226 Difference]: Without dead ends: 214 [2021-06-12 19:59:50,412 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 398.4ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:59:50,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-12 19:59:50,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 196. [2021-06-12 19:59:50,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1794871794871793) internal successors, (425), 195 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:50,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 425 transitions. [2021-06-12 19:59:50,414 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 425 transitions. Word has length 19 [2021-06-12 19:59:50,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:50,414 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 425 transitions. [2021-06-12 19:59:50,414 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) [2021-06-12 19:59:50,414 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 425 transitions. [2021-06-12 19:59:50,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:50,414 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:50,414 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:50,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3154 [2021-06-12 19:59:50,615 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:50,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:50,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1578080900, now seen corresponding path program 425 times [2021-06-12 19:59:50,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:50,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619655100] [2021-06-12 19:59:50,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:50,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:50,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619655100] [2021-06-12 19:59:50,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619655100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:50,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678361078] [2021-06-12 19:59:50,712 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 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 [2021-06-12 19:59:50,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:59:50,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:50,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:50,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:50,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678361078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:50,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:50,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:50,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447073428] [2021-06-12 19:59:50,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:50,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:50,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:50,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:50,927 INFO L87 Difference]: Start difference. First operand 196 states and 425 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) [2021-06-12 19:59:51,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:51,384 INFO L93 Difference]: Finished difference Result 263 states and 555 transitions. [2021-06-12 19:59:51,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:59:51,385 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 [2021-06-12 19:59:51,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:51,385 INFO L225 Difference]: With dead ends: 263 [2021-06-12 19:59:51,385 INFO L226 Difference]: Without dead ends: 263 [2021-06-12 19:59:51,385 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 554.2ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:59:51,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-12 19:59:51,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 198. [2021-06-12 19:59:51,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.197969543147208) internal successors, (433), 197 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:51,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 433 transitions. [2021-06-12 19:59:51,388 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 433 transitions. Word has length 19 [2021-06-12 19:59:51,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:51,388 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 433 transitions. [2021-06-12 19:59:51,388 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) [2021-06-12 19:59:51,388 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 433 transitions. [2021-06-12 19:59:51,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:51,388 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:51,388 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:51,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3162,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:51,593 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:51,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:51,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1276090620, now seen corresponding path program 426 times [2021-06-12 19:59:51,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:51,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680441779] [2021-06-12 19:59:51,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:51,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:51,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680441779] [2021-06-12 19:59:51,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680441779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:51,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756343264] [2021-06-12 19:59:51,688 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 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 [2021-06-12 19:59:51,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:59:51,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:51,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:51,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:51,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:51,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756343264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:51,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:51,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:51,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045227872] [2021-06-12 19:59:51,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:51,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:51,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:51,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:51,898 INFO L87 Difference]: Start difference. First operand 198 states and 433 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) [2021-06-12 19:59:52,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:52,275 INFO L93 Difference]: Finished difference Result 236 states and 507 transitions. [2021-06-12 19:59:52,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:59:52,275 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 [2021-06-12 19:59:52,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:52,275 INFO L225 Difference]: With dead ends: 236 [2021-06-12 19:59:52,275 INFO L226 Difference]: Without dead ends: 236 [2021-06-12 19:59:52,276 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 452.8ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:59:52,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-12 19:59:52,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 197. [2021-06-12 19:59:52,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.1989795918367347) internal successors, (431), 196 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:52,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 431 transitions. [2021-06-12 19:59:52,277 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 431 transitions. Word has length 19 [2021-06-12 19:59:52,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:52,277 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 431 transitions. [2021-06-12 19:59:52,277 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) [2021-06-12 19:59:52,278 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 431 transitions. [2021-06-12 19:59:52,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:52,278 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:52,278 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:52,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3169,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:52,478 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:52,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:52,478 INFO L82 PathProgramCache]: Analyzing trace with hash -769744354, now seen corresponding path program 427 times [2021-06-12 19:59:52,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:52,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410693694] [2021-06-12 19:59:52,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:52,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:52,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:52,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:52,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410693694] [2021-06-12 19:59:52,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410693694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:52,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626679226] [2021-06-12 19:59:52,582 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 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 [2021-06-12 19:59:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:52,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:52,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:52,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626679226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:52,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:52,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:52,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661519740] [2021-06-12 19:59:52,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:52,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:52,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:52,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:52,785 INFO L87 Difference]: Start difference. First operand 197 states and 431 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) [2021-06-12 19:59:52,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:52,941 INFO L93 Difference]: Finished difference Result 230 states and 493 transitions. [2021-06-12 19:59:52,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:59:52,941 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 [2021-06-12 19:59:52,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:52,941 INFO L225 Difference]: With dead ends: 230 [2021-06-12 19:59:52,941 INFO L226 Difference]: Without dead ends: 230 [2021-06-12 19:59:52,941 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 227.3ms TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:52,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-12 19:59:52,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 191. [2021-06-12 19:59:52,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1842105263157894) internal successors, (415), 190 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:52,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 415 transitions. [2021-06-12 19:59:52,943 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 415 transitions. Word has length 19 [2021-06-12 19:59:52,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:52,943 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 415 transitions. [2021-06-12 19:59:52,943 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) [2021-06-12 19:59:52,943 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 415 transitions. [2021-06-12 19:59:52,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:52,943 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:52,943 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:53,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3174,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:53,144 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:53,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:53,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1049111361, now seen corresponding path program 428 times [2021-06-12 19:59:53,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:53,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388541666] [2021-06-12 19:59:53,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:53,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:53,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:53,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388541666] [2021-06-12 19:59:53,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388541666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:53,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55787096] [2021-06-12 19:59:53,271 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 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 [2021-06-12 19:59:53,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:53,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:53,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:59:53,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:53,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:53,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55787096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:53,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:53,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:53,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221824762] [2021-06-12 19:59:53,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:53,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:53,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:53,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:53,469 INFO L87 Difference]: Start difference. First operand 191 states and 415 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) [2021-06-12 19:59:53,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:53,640 INFO L93 Difference]: Finished difference Result 217 states and 467 transitions. [2021-06-12 19:59:53,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:59:53,640 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 [2021-06-12 19:59:53,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:53,640 INFO L225 Difference]: With dead ends: 217 [2021-06-12 19:59:53,640 INFO L226 Difference]: Without dead ends: 217 [2021-06-12 19:59:53,640 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 283.4ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:53,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-12 19:59:53,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 192. [2021-06-12 19:59:53,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.183246073298429) internal successors, (417), 191 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) [2021-06-12 19:59:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 417 transitions. [2021-06-12 19:59:53,642 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 417 transitions. Word has length 19 [2021-06-12 19:59:53,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:53,642 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 417 transitions. [2021-06-12 19:59:53,642 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) [2021-06-12 19:59:53,642 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 417 transitions. [2021-06-12 19:59:53,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:53,642 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:53,642 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:53,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3179,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:53,843 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:53,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:53,843 INFO L82 PathProgramCache]: Analyzing trace with hash -252375609, now seen corresponding path program 429 times [2021-06-12 19:59:53,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:53,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191405446] [2021-06-12 19:59:53,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:53,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:53,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:53,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191405446] [2021-06-12 19:59:53,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191405446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:53,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658533726] [2021-06-12 19:59:53,976 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 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 [2021-06-12 19:59:54,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:59:54,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:54,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:59:54,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:54,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658533726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:54,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:54,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:59:54,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391195825] [2021-06-12 19:59:54,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:54,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:54,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:54,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:54,191 INFO L87 Difference]: Start difference. First operand 192 states and 417 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) [2021-06-12 19:59:54,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:54,417 INFO L93 Difference]: Finished difference Result 236 states and 502 transitions. [2021-06-12 19:59:54,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:59:54,418 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 [2021-06-12 19:59:54,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:54,418 INFO L225 Difference]: With dead ends: 236 [2021-06-12 19:59:54,418 INFO L226 Difference]: Without dead ends: 233 [2021-06-12 19:59:54,418 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 297.4ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:59:54,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-12 19:59:54,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 193. [2021-06-12 19:59:54,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.1875) internal successors, (420), 192 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) [2021-06-12 19:59:54,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 420 transitions. [2021-06-12 19:59:54,420 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 420 transitions. Word has length 19 [2021-06-12 19:59:54,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:54,420 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 420 transitions. [2021-06-12 19:59:54,420 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) [2021-06-12 19:59:54,420 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 420 transitions. [2021-06-12 19:59:54,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:54,420 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:54,420 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:54,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3184 [2021-06-12 19:59:54,621 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:54,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:54,621 INFO L82 PathProgramCache]: Analyzing trace with hash 875020484, now seen corresponding path program 430 times [2021-06-12 19:59:54,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:54,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066203750] [2021-06-12 19:59:54,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:54,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:54,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066203750] [2021-06-12 19:59:54,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066203750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:54,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889558135] [2021-06-12 19:59:54,745 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 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 [2021-06-12 19:59:54,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:54,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:54,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:54,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:54,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889558135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:54,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:54,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:54,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921008136] [2021-06-12 19:59:54,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:54,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:54,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:54,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:54,984 INFO L87 Difference]: Start difference. First operand 193 states and 420 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) [2021-06-12 19:59:55,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:55,157 INFO L93 Difference]: Finished difference Result 211 states and 453 transitions. [2021-06-12 19:59:55,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:59:55,158 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 [2021-06-12 19:59:55,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:55,158 INFO L225 Difference]: With dead ends: 211 [2021-06-12 19:59:55,158 INFO L226 Difference]: Without dead ends: 209 [2021-06-12 19:59:55,158 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 310.2ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:55,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-06-12 19:59:55,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 191. [2021-06-12 19:59:55,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1842105263157894) internal successors, (415), 190 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:55,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 415 transitions. [2021-06-12 19:59:55,160 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 415 transitions. Word has length 19 [2021-06-12 19:59:55,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:55,160 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 415 transitions. [2021-06-12 19:59:55,160 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) [2021-06-12 19:59:55,160 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 415 transitions. [2021-06-12 19:59:55,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:55,160 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:55,160 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:55,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3192 [2021-06-12 19:59:55,360 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:55,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:55,361 INFO L82 PathProgramCache]: Analyzing trace with hash 253970657, now seen corresponding path program 431 times [2021-06-12 19:59:55,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:55,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555743995] [2021-06-12 19:59:55,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:55,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:55,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:55,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555743995] [2021-06-12 19:59:55,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555743995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:55,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397619721] [2021-06-12 19:59:55,478 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 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 [2021-06-12 19:59:55,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:59:55,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:55,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:55,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:55,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397619721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:55,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:55,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:55,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809490704] [2021-06-12 19:59:55,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:55,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:55,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:55,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:55,738 INFO L87 Difference]: Start difference. First operand 191 states and 415 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) [2021-06-12 19:59:55,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:55,923 INFO L93 Difference]: Finished difference Result 208 states and 449 transitions. [2021-06-12 19:59:55,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:59:55,924 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 [2021-06-12 19:59:55,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:55,924 INFO L225 Difference]: With dead ends: 208 [2021-06-12 19:59:55,924 INFO L226 Difference]: Without dead ends: 208 [2021-06-12 19:59:55,924 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 350.5ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:55,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-12 19:59:55,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 193. [2021-06-12 19:59:55,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.1822916666666665) internal successors, (419), 192 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:55,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 419 transitions. [2021-06-12 19:59:55,926 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 419 transitions. Word has length 19 [2021-06-12 19:59:55,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:55,926 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 419 transitions. [2021-06-12 19:59:55,926 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) [2021-06-12 19:59:55,926 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 419 transitions. [2021-06-12 19:59:55,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:55,926 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:55,926 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:56,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3200,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:56,127 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:56,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:56,127 INFO L82 PathProgramCache]: Analyzing trace with hash 541520892, now seen corresponding path program 432 times [2021-06-12 19:59:56,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:56,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126074082] [2021-06-12 19:59:56,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:56,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:56,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126074082] [2021-06-12 19:59:56,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126074082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:56,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202516067] [2021-06-12 19:59:56,281 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 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 [2021-06-12 19:59:56,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:59:56,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:56,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:56,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:56,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202516067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:56,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:56,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:56,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055563887] [2021-06-12 19:59:56,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:56,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:56,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:56,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:56,485 INFO L87 Difference]: Start difference. First operand 193 states and 419 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) [2021-06-12 19:59:56,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:56,829 INFO L93 Difference]: Finished difference Result 243 states and 515 transitions. [2021-06-12 19:59:56,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:59:56,829 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 [2021-06-12 19:59:56,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:56,829 INFO L225 Difference]: With dead ends: 243 [2021-06-12 19:59:56,829 INFO L226 Difference]: Without dead ends: 243 [2021-06-12 19:59:56,829 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 432.3ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:59:56,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-06-12 19:59:56,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 194. [2021-06-12 19:59:56,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.1968911917098444) internal successors, (424), 193 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:56,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 424 transitions. [2021-06-12 19:59:56,831 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 424 transitions. Word has length 19 [2021-06-12 19:59:56,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:56,831 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 424 transitions. [2021-06-12 19:59:56,831 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) [2021-06-12 19:59:56,831 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 424 transitions. [2021-06-12 19:59:56,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:56,832 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:56,832 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:57,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3208 [2021-06-12 19:59:57,032 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:57,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:57,032 INFO L82 PathProgramCache]: Analyzing trace with hash 843511172, now seen corresponding path program 433 times [2021-06-12 19:59:57,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:57,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241893748] [2021-06-12 19:59:57,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:57,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:57,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:57,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241893748] [2021-06-12 19:59:57,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241893748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:57,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974205546] [2021-06-12 19:59:57,161 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 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 [2021-06-12 19:59:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:57,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:57,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:57,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974205546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:57,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:57,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:57,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914012658] [2021-06-12 19:59:57,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:57,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:57,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:57,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:57,366 INFO L87 Difference]: Start difference. First operand 194 states and 424 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) [2021-06-12 19:59:57,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:57,574 INFO L93 Difference]: Finished difference Result 220 states and 473 transitions. [2021-06-12 19:59:57,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:59:57,574 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 [2021-06-12 19:59:57,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:57,574 INFO L225 Difference]: With dead ends: 220 [2021-06-12 19:59:57,574 INFO L226 Difference]: Without dead ends: 220 [2021-06-12 19:59:57,575 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 341.0ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:59:57,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-12 19:59:57,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 190. [2021-06-12 19:59:57,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.185185185185185) internal successors, (413), 189 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) [2021-06-12 19:59:57,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 413 transitions. [2021-06-12 19:59:57,576 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 413 transitions. Word has length 19 [2021-06-12 19:59:57,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:57,576 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 413 transitions. [2021-06-12 19:59:57,576 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) [2021-06-12 19:59:57,576 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 413 transitions. [2021-06-12 19:59:57,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:57,577 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:57,577 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:57,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3215,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:57,777 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:57,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:57,777 INFO L82 PathProgramCache]: Analyzing trace with hash -101768188, now seen corresponding path program 434 times [2021-06-12 19:59:57,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:57,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425075051] [2021-06-12 19:59:57,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:57,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:57,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:57,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425075051] [2021-06-12 19:59:57,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425075051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:57,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537972473] [2021-06-12 19:59:57,871 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 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 [2021-06-12 19:59:57,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:57,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:57,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:59:57,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:58,122 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:58,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537972473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:58,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:58,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:58,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038906272] [2021-06-12 19:59:58,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:58,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:58,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:58,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:58,123 INFO L87 Difference]: Start difference. First operand 190 states and 413 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) [2021-06-12 19:59:58,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:58,731 INFO L93 Difference]: Finished difference Result 262 states and 552 transitions. [2021-06-12 19:59:58,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:59:58,731 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 [2021-06-12 19:59:58,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:58,732 INFO L225 Difference]: With dead ends: 262 [2021-06-12 19:59:58,732 INFO L226 Difference]: Without dead ends: 262 [2021-06-12 19:59:58,732 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 674.6ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:59:58,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-12 19:59:58,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 193. [2021-06-12 19:59:58,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.203125) internal successors, (423), 192 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) [2021-06-12 19:59:58,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 423 transitions. [2021-06-12 19:59:58,735 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 423 transitions. Word has length 19 [2021-06-12 19:59:58,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:58,735 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 423 transitions. [2021-06-12 19:59:58,735 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) [2021-06-12 19:59:58,735 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 423 transitions. [2021-06-12 19:59:58,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:58,735 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:58,735 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:58,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3220 [2021-06-12 19:59:58,958 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:58,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:58,958 INFO L82 PathProgramCache]: Analyzing trace with hash -639623766, now seen corresponding path program 435 times [2021-06-12 19:59:58,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:58,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055930999] [2021-06-12 19:59:58,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:59,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:59,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055930999] [2021-06-12 19:59:59,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055930999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:59,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835507578] [2021-06-12 19:59:59,055 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 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 [2021-06-12 19:59:59,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:59:59,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:59,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:59:59,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:59,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835507578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:59,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:59,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:59:59,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489671641] [2021-06-12 19:59:59,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:59,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:59,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:59,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:59,263 INFO L87 Difference]: Start difference. First operand 193 states and 423 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) [2021-06-12 19:59:59,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:59,706 INFO L93 Difference]: Finished difference Result 231 states and 497 transitions. [2021-06-12 19:59:59,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:59,707 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 [2021-06-12 19:59:59,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:59,707 INFO L225 Difference]: With dead ends: 231 [2021-06-12 19:59:59,707 INFO L226 Difference]: Without dead ends: 231 [2021-06-12 19:59:59,707 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 520.4ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:59:59,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-12 19:59:59,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 193. [2021-06-12 19:59:59,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.203125) internal successors, (423), 192 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) [2021-06-12 19:59:59,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 423 transitions. [2021-06-12 19:59:59,709 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 423 transitions. Word has length 19 [2021-06-12 19:59:59,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:59,709 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 423 transitions. [2021-06-12 19:59:59,709 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) [2021-06-12 19:59:59,709 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 423 transitions. [2021-06-12 19:59:59,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:59,710 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:59,710 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:59,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3226,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:59,910 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:59,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:59,910 INFO L82 PathProgramCache]: Analyzing trace with hash -133277500, now seen corresponding path program 436 times [2021-06-12 19:59:59,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:59,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368074329] [2021-06-12 19:59:59,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:00,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:00,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368074329] [2021-06-12 20:00:00,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368074329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:00,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500353327] [2021-06-12 20:00:00,012 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 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 [2021-06-12 20:00:00,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:00,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:00,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:00,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:00,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500353327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:00,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:00,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:00,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730998700] [2021-06-12 20:00:00,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:00,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:00,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:00,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:00,212 INFO L87 Difference]: Start difference. First operand 193 states and 423 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) [2021-06-12 20:00:00,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:00,388 INFO L93 Difference]: Finished difference Result 226 states and 485 transitions. [2021-06-12 20:00:00,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:00:00,388 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 [2021-06-12 20:00:00,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:00,388 INFO L225 Difference]: With dead ends: 226 [2021-06-12 20:00:00,388 INFO L226 Difference]: Without dead ends: 226 [2021-06-12 20:00:00,388 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 256.7ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:00,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-12 20:00:00,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 190. [2021-06-12 20:00:00,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.185185185185185) internal successors, (413), 189 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) [2021-06-12 20:00:00,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 413 transitions. [2021-06-12 20:00:00,390 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 413 transitions. Word has length 19 [2021-06-12 20:00:00,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:00,390 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 413 transitions. [2021-06-12 20:00:00,390 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) [2021-06-12 20:00:00,390 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 413 transitions. [2021-06-12 20:00:00,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:00,390 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:00,390 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:00,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3231 [2021-06-12 20:00:00,591 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:00,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:00,591 INFO L82 PathProgramCache]: Analyzing trace with hash 38292897, now seen corresponding path program 437 times [2021-06-12 20:00:00,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:00,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250010407] [2021-06-12 20:00:00,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:00,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:00,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250010407] [2021-06-12 20:00:00,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250010407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:00,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356534615] [2021-06-12 20:00:00,685 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 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 [2021-06-12 20:00:00,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:00:00,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:00,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:00,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:00,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356534615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:00,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:00,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:00:00,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329151334] [2021-06-12 20:00:00,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:00:00,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:00,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:00:00,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:00,998 INFO L87 Difference]: Start difference. First operand 190 states and 413 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) [2021-06-12 20:00:01,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:01,470 INFO L93 Difference]: Finished difference Result 216 states and 461 transitions. [2021-06-12 20:00:01,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:00:01,470 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 [2021-06-12 20:00:01,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:01,470 INFO L225 Difference]: With dead ends: 216 [2021-06-12 20:00:01,471 INFO L226 Difference]: Without dead ends: 207 [2021-06-12 20:00:01,471 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 610.7ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:00:01,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-12 20:00:01,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 193. [2021-06-12 20:00:01,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.1822916666666665) internal successors, (419), 192 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:01,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 419 transitions. [2021-06-12 20:00:01,472 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 419 transitions. Word has length 19 [2021-06-12 20:00:01,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:01,472 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 419 transitions. [2021-06-12 20:00:01,472 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) [2021-06-12 20:00:01,472 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 419 transitions. [2021-06-12 20:00:01,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:01,473 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:01,473 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:01,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3236,438 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:01,673 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:01,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:01,673 INFO L82 PathProgramCache]: Analyzing trace with hash 325843132, now seen corresponding path program 438 times [2021-06-12 20:00:01,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:01,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232137331] [2021-06-12 20:00:01,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:01,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:01,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:01,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:01,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232137331] [2021-06-12 20:00:01,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232137331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:01,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842802688] [2021-06-12 20:00:01,768 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 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 [2021-06-12 20:00:01,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:00:01,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:01,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:01,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:02,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842802688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:02,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:02,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:00:02,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900799238] [2021-06-12 20:00:02,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:00:02,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:02,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:00:02,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:02,002 INFO L87 Difference]: Start difference. First operand 193 states and 419 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) [2021-06-12 20:00:02,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:02,679 INFO L93 Difference]: Finished difference Result 254 states and 537 transitions. [2021-06-12 20:00:02,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:00:02,680 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 [2021-06-12 20:00:02,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:02,680 INFO L225 Difference]: With dead ends: 254 [2021-06-12 20:00:02,680 INFO L226 Difference]: Without dead ends: 254 [2021-06-12 20:00:02,680 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 746.3ms TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:00:02,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-12 20:00:02,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 196. [2021-06-12 20:00:02,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.2051282051282053) internal successors, (430), 195 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:02,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 430 transitions. [2021-06-12 20:00:02,683 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 430 transitions. Word has length 19 [2021-06-12 20:00:02,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:02,683 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 430 transitions. [2021-06-12 20:00:02,683 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) [2021-06-12 20:00:02,683 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 430 transitions. [2021-06-12 20:00:02,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:02,683 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:02,683 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:02,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3244,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:02,897 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:02,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:02,897 INFO L82 PathProgramCache]: Analyzing trace with hash 627833412, now seen corresponding path program 439 times [2021-06-12 20:00:02,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:02,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133920493] [2021-06-12 20:00:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:02,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:02,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:02,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:02,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133920493] [2021-06-12 20:00:02,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133920493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:02,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185729811] [2021-06-12 20:00:02,993 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 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 [2021-06-12 20:00:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:03,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:03,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:03,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185729811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:03,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:03,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:00:03,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328279398] [2021-06-12 20:00:03,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:00:03,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:03,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:00:03,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:03,226 INFO L87 Difference]: Start difference. First operand 196 states and 430 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) [2021-06-12 20:00:03,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:03,846 INFO L93 Difference]: Finished difference Result 241 states and 517 transitions. [2021-06-12 20:00:03,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:00:03,846 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 [2021-06-12 20:00:03,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:03,846 INFO L225 Difference]: With dead ends: 241 [2021-06-12 20:00:03,846 INFO L226 Difference]: Without dead ends: 241 [2021-06-12 20:00:03,846 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 673.0ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:00:03,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-12 20:00:03,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 195. [2021-06-12 20:00:03,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.2061855670103094) internal successors, (428), 194 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:03,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 428 transitions. [2021-06-12 20:00:03,848 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 428 transitions. Word has length 19 [2021-06-12 20:00:03,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:03,848 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 428 transitions. [2021-06-12 20:00:03,848 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) [2021-06-12 20:00:03,848 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 428 transitions. [2021-06-12 20:00:03,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:03,849 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:03,849 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:04,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3251,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:04,049 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:04,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:04,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1134179678, now seen corresponding path program 440 times [2021-06-12 20:00:04,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:04,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766708149] [2021-06-12 20:00:04,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:04,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:04,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:04,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766708149] [2021-06-12 20:00:04,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766708149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:04,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125911876] [2021-06-12 20:00:04,145 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 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 [2021-06-12 20:00:04,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:04,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:04,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:04,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:04,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125911876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:04,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:04,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:00:04,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982000074] [2021-06-12 20:00:04,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:00:04,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:04,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:00:04,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:04,369 INFO L87 Difference]: Start difference. First operand 195 states and 428 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) [2021-06-12 20:00:04,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:04,891 INFO L93 Difference]: Finished difference Result 238 states and 512 transitions. [2021-06-12 20:00:04,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:00:04,892 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 [2021-06-12 20:00:04,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:04,892 INFO L225 Difference]: With dead ends: 238 [2021-06-12 20:00:04,892 INFO L226 Difference]: Without dead ends: 238 [2021-06-12 20:00:04,892 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 598.8ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:00:04,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-12 20:00:04,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 194. [2021-06-12 20:00:04,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.2072538860103625) internal successors, (426), 193 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:04,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 426 transitions. [2021-06-12 20:00:04,894 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 426 transitions. Word has length 19 [2021-06-12 20:00:04,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:04,894 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 426 transitions. [2021-06-12 20:00:04,894 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) [2021-06-12 20:00:04,894 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 426 transitions. [2021-06-12 20:00:04,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:04,894 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:04,894 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:05,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3256,441 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:05,095 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:05,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:05,095 INFO L82 PathProgramCache]: Analyzing trace with hash -348955260, now seen corresponding path program 441 times [2021-06-12 20:00:05,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:05,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517032754] [2021-06-12 20:00:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:05,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:05,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517032754] [2021-06-12 20:00:05,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517032754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:05,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295633958] [2021-06-12 20:00:05,186 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 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 [2021-06-12 20:00:05,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:00:05,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:05,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:00:05,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:05,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295633958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:05,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:05,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:00:05,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077181207] [2021-06-12 20:00:05,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:00:05,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:05,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:00:05,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:05,402 INFO L87 Difference]: Start difference. First operand 194 states and 426 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) [2021-06-12 20:00:05,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:05,702 INFO L93 Difference]: Finished difference Result 218 states and 469 transitions. [2021-06-12 20:00:05,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:00:05,703 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 [2021-06-12 20:00:05,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:05,703 INFO L225 Difference]: With dead ends: 218 [2021-06-12 20:00:05,703 INFO L226 Difference]: Without dead ends: 218 [2021-06-12 20:00:05,703 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 358.3ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:00:05,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-12 20:00:05,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 189. [2021-06-12 20:00:05,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.1861702127659575) internal successors, (411), 188 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:05,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 411 transitions. [2021-06-12 20:00:05,705 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 411 transitions. Word has length 19 [2021-06-12 20:00:05,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:05,705 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 411 transitions. [2021-06-12 20:00:05,705 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) [2021-06-12 20:00:05,705 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 411 transitions. [2021-06-12 20:00:05,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:05,705 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:05,705 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:05,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3261,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:05,918 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:05,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:05,918 INFO L82 PathProgramCache]: Analyzing trace with hash -657700315, now seen corresponding path program 442 times [2021-06-12 20:00:05,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:05,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341631472] [2021-06-12 20:00:05,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:06,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:06,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:06,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341631472] [2021-06-12 20:00:06,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341631472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:06,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502662792] [2021-06-12 20:00:06,015 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 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 [2021-06-12 20:00:06,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:06,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:06,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:06,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:06,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:06,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502662792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:06,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:06,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:06,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958420870] [2021-06-12 20:00:06,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:06,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:06,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:06,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:06,276 INFO L87 Difference]: Start difference. First operand 189 states and 411 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) [2021-06-12 20:00:06,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:06,393 INFO L93 Difference]: Finished difference Result 198 states and 429 transitions. [2021-06-12 20:00:06,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:00:06,393 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 [2021-06-12 20:00:06,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:06,393 INFO L225 Difference]: With dead ends: 198 [2021-06-12 20:00:06,393 INFO L226 Difference]: Without dead ends: 198 [2021-06-12 20:00:06,394 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 237.1ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:06,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-12 20:00:06,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 189. [2021-06-12 20:00:06,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.1861702127659575) internal successors, (411), 188 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:06,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 411 transitions. [2021-06-12 20:00:06,395 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 411 transitions. Word has length 19 [2021-06-12 20:00:06,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:06,395 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 411 transitions. [2021-06-12 20:00:06,395 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) [2021-06-12 20:00:06,395 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 411 transitions. [2021-06-12 20:00:06,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:06,396 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:06,396 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:06,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3266,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:06,596 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:06,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:06,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1728695779, now seen corresponding path program 443 times [2021-06-12 20:00:06,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:06,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987539647] [2021-06-12 20:00:06,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:06,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:06,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:06,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987539647] [2021-06-12 20:00:06,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987539647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:06,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877267738] [2021-06-12 20:00:06,695 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 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 [2021-06-12 20:00:06,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:00:06,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:06,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:06,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:06,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877267738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:06,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:06,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:06,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383893983] [2021-06-12 20:00:06,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:06,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:06,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:06,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:06,916 INFO L87 Difference]: Start difference. First operand 189 states and 411 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) [2021-06-12 20:00:07,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:07,272 INFO L93 Difference]: Finished difference Result 207 states and 447 transitions. [2021-06-12 20:00:07,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:07,273 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 [2021-06-12 20:00:07,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:07,273 INFO L225 Difference]: With dead ends: 207 [2021-06-12 20:00:07,273 INFO L226 Difference]: Without dead ends: 207 [2021-06-12 20:00:07,273 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 452.8ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:00:07,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-12 20:00:07,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2021-06-12 20:00:07,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.1861702127659575) internal successors, (411), 188 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:07,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 411 transitions. [2021-06-12 20:00:07,275 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 411 transitions. Word has length 19 [2021-06-12 20:00:07,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:07,275 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 411 transitions. [2021-06-12 20:00:07,275 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) [2021-06-12 20:00:07,275 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 411 transitions. [2021-06-12 20:00:07,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:07,275 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:07,275 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:07,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3271 [2021-06-12 20:00:07,476 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:07,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:07,476 INFO L82 PathProgramCache]: Analyzing trace with hash -931960027, now seen corresponding path program 444 times [2021-06-12 20:00:07,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:07,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23865810] [2021-06-12 20:00:07,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:07,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:07,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23865810] [2021-06-12 20:00:07,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23865810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:07,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107567200] [2021-06-12 20:00:07,572 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 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 [2021-06-12 20:00:07,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:00:07,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:07,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:07,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:07,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107567200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:07,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:07,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:07,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280762555] [2021-06-12 20:00:07,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:07,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:07,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:07,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:07,802 INFO L87 Difference]: Start difference. First operand 189 states and 411 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) [2021-06-12 20:00:08,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:08,185 INFO L93 Difference]: Finished difference Result 207 states and 447 transitions. [2021-06-12 20:00:08,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:00:08,185 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 [2021-06-12 20:00:08,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:08,186 INFO L225 Difference]: With dead ends: 207 [2021-06-12 20:00:08,186 INFO L226 Difference]: Without dead ends: 207 [2021-06-12 20:00:08,186 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 462.1ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:00:08,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-12 20:00:08,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2021-06-12 20:00:08,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.1861702127659575) internal successors, (411), 188 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:08,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 411 transitions. [2021-06-12 20:00:08,187 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 411 transitions. Word has length 19 [2021-06-12 20:00:08,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:08,187 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 411 transitions. [2021-06-12 20:00:08,188 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) [2021-06-12 20:00:08,188 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 411 transitions. [2021-06-12 20:00:08,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:08,188 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:08,188 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:08,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3276 [2021-06-12 20:00:08,393 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:08,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:08,393 INFO L82 PathProgramCache]: Analyzing trace with hash -644409792, now seen corresponding path program 445 times [2021-06-12 20:00:08,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:08,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084716130] [2021-06-12 20:00:08,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:08,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:08,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084716130] [2021-06-12 20:00:08,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084716130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:08,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044140658] [2021-06-12 20:00:08,499 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 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 [2021-06-12 20:00:08,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:08,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:08,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:08,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044140658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:08,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:08,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:08,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625845352] [2021-06-12 20:00:08,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:08,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:08,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:08,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:08,760 INFO L87 Difference]: Start difference. First operand 189 states and 411 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) [2021-06-12 20:00:08,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:08,916 INFO L93 Difference]: Finished difference Result 199 states and 430 transitions. [2021-06-12 20:00:08,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:00:08,916 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 [2021-06-12 20:00:08,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:08,916 INFO L225 Difference]: With dead ends: 199 [2021-06-12 20:00:08,916 INFO L226 Difference]: Without dead ends: 199 [2021-06-12 20:00:08,916 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 316.4ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:08,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-12 20:00:08,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 184. [2021-06-12 20:00:08,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.169398907103825) internal successors, (397), 183 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) [2021-06-12 20:00:08,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 397 transitions. [2021-06-12 20:00:08,918 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 397 transitions. Word has length 19 [2021-06-12 20:00:08,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:08,918 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 397 transitions. [2021-06-12 20:00:08,918 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) [2021-06-12 20:00:08,918 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 397 transitions. [2021-06-12 20:00:08,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:08,918 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:08,918 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:09,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3283,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:09,119 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:09,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:09,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1083136579, now seen corresponding path program 446 times [2021-06-12 20:00:09,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:09,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751161370] [2021-06-12 20:00:09,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:09,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:09,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:09,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:09,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751161370] [2021-06-12 20:00:09,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751161370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:09,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964608440] [2021-06-12 20:00:09,243 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 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 [2021-06-12 20:00:09,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:09,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:09,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:00:09,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:09,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964608440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:09,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:09,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:09,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477708756] [2021-06-12 20:00:09,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:09,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:09,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:09,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:09,471 INFO L87 Difference]: Start difference. First operand 184 states and 397 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) [2021-06-12 20:00:09,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:09,782 INFO L93 Difference]: Finished difference Result 207 states and 443 transitions. [2021-06-12 20:00:09,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:00:09,782 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 [2021-06-12 20:00:09,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:09,782 INFO L225 Difference]: With dead ends: 207 [2021-06-12 20:00:09,782 INFO L226 Difference]: Without dead ends: 207 [2021-06-12 20:00:09,783 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 426.7ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:00:09,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-12 20:00:09,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 184. [2021-06-12 20:00:09,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.169398907103825) internal successors, (397), 183 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) [2021-06-12 20:00:09,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 397 transitions. [2021-06-12 20:00:09,784 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 397 transitions. Word has length 19 [2021-06-12 20:00:09,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:09,784 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 397 transitions. [2021-06-12 20:00:09,784 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) [2021-06-12 20:00:09,784 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 397 transitions. [2021-06-12 20:00:09,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:09,785 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:09,785 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:09,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3291 [2021-06-12 20:00:09,985 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:09,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:09,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1879872331, now seen corresponding path program 447 times [2021-06-12 20:00:09,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:09,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917939426] [2021-06-12 20:00:09,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:10,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:10,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917939426] [2021-06-12 20:00:10,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917939426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:10,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23032799] [2021-06-12 20:00:10,105 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 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 [2021-06-12 20:00:10,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:00:10,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:10,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:00:10,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:10,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23032799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:10,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:10,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:10,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312917580] [2021-06-12 20:00:10,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:10,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:10,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:10,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:10,403 INFO L87 Difference]: Start difference. First operand 184 states and 397 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) [2021-06-12 20:00:10,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:10,904 INFO L93 Difference]: Finished difference Result 223 states and 470 transitions. [2021-06-12 20:00:10,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:00:10,904 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 [2021-06-12 20:00:10,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:10,904 INFO L225 Difference]: With dead ends: 223 [2021-06-12 20:00:10,904 INFO L226 Difference]: Without dead ends: 220 [2021-06-12 20:00:10,904 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 610.2ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:00:10,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-12 20:00:10,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 184. [2021-06-12 20:00:10,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.1639344262295084) internal successors, (396), 183 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:10,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 396 transitions. [2021-06-12 20:00:10,906 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 396 transitions. Word has length 19 [2021-06-12 20:00:10,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:10,906 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 396 transitions. [2021-06-12 20:00:10,906 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) [2021-06-12 20:00:10,906 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 396 transitions. [2021-06-12 20:00:10,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:10,906 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:10,906 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:11,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3296 [2021-06-12 20:00:11,107 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:11,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:11,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1287698872, now seen corresponding path program 448 times [2021-06-12 20:00:11,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:11,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723428967] [2021-06-12 20:00:11,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:11,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:11,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723428967] [2021-06-12 20:00:11,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723428967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:11,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387799902] [2021-06-12 20:00:11,231 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 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 [2021-06-12 20:00:11,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:11,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:11,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:11,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:11,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387799902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:11,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:11,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:11,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788619389] [2021-06-12 20:00:11,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:11,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:11,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:11,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:11,482 INFO L87 Difference]: Start difference. First operand 184 states and 396 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) [2021-06-12 20:00:11,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:11,792 INFO L93 Difference]: Finished difference Result 199 states and 423 transitions. [2021-06-12 20:00:11,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:00:11,792 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 [2021-06-12 20:00:11,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:11,792 INFO L225 Difference]: With dead ends: 199 [2021-06-12 20:00:11,792 INFO L226 Difference]: Without dead ends: 197 [2021-06-12 20:00:11,792 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 440.8ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:00:11,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-12 20:00:11,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 182. [2021-06-12 20:00:11,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.160220994475138) internal successors, (391), 181 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:11,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 391 transitions. [2021-06-12 20:00:11,794 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 391 transitions. Word has length 19 [2021-06-12 20:00:11,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:11,794 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 391 transitions. [2021-06-12 20:00:11,794 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) [2021-06-12 20:00:11,794 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 391 transitions. [2021-06-12 20:00:11,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:11,794 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:11,794 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:11,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3304,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:11,995 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:11,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:11,995 INFO L82 PathProgramCache]: Analyzing trace with hash -781352606, now seen corresponding path program 449 times [2021-06-12 20:00:11,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:11,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050651169] [2021-06-12 20:00:11,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:11,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:12,118 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:12,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:12,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050651169] [2021-06-12 20:00:12,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050651169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:12,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882201468] [2021-06-12 20:00:12,119 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 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 [2021-06-12 20:00:12,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:00:12,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:12,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:12,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:12,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882201468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:12,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:12,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:12,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577832298] [2021-06-12 20:00:12,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:12,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:12,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:12,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:12,345 INFO L87 Difference]: Start difference. First operand 182 states and 391 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) [2021-06-12 20:00:12,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:12,755 INFO L93 Difference]: Finished difference Result 266 states and 541 transitions. [2021-06-12 20:00:12,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:00:12,755 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 [2021-06-12 20:00:12,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:12,756 INFO L225 Difference]: With dead ends: 266 [2021-06-12 20:00:12,756 INFO L226 Difference]: Without dead ends: 266 [2021-06-12 20:00:12,756 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 445.0ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:00:12,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-12 20:00:12,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 185. [2021-06-12 20:00:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.1739130434782608) internal successors, (400), 184 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) [2021-06-12 20:00:12,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 400 transitions. [2021-06-12 20:00:12,758 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 400 transitions. Word has length 19 [2021-06-12 20:00:12,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:12,758 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 400 transitions. [2021-06-12 20:00:12,758 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) [2021-06-12 20:00:12,758 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 400 transitions. [2021-06-12 20:00:12,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:12,758 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:12,758 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:12,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3312,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:12,959 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:12,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:12,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1319208184, now seen corresponding path program 450 times [2021-06-12 20:00:12,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:12,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212812773] [2021-06-12 20:00:12,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:13,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:13,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212812773] [2021-06-12 20:00:13,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212812773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:13,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345368402] [2021-06-12 20:00:13,078 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 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 [2021-06-12 20:00:13,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:00:13,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:13,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:13,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:13,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345368402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:13,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:13,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:13,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772558325] [2021-06-12 20:00:13,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:13,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:13,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:13,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:13,296 INFO L87 Difference]: Start difference. First operand 185 states and 400 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) [2021-06-12 20:00:13,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:13,483 INFO L93 Difference]: Finished difference Result 211 states and 449 transitions. [2021-06-12 20:00:13,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:00:13,484 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 [2021-06-12 20:00:13,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:13,484 INFO L225 Difference]: With dead ends: 211 [2021-06-12 20:00:13,484 INFO L226 Difference]: Without dead ends: 211 [2021-06-12 20:00:13,484 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 286.6ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:13,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-12 20:00:13,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 180. [2021-06-12 20:00:13,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1620111731843576) internal successors, (387), 179 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) [2021-06-12 20:00:13,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 387 transitions. [2021-06-12 20:00:13,486 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 387 transitions. Word has length 19 [2021-06-12 20:00:13,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:13,486 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 387 transitions. [2021-06-12 20:00:13,486 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) [2021-06-12 20:00:13,486 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 387 transitions. [2021-06-12 20:00:13,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:13,486 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:13,486 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:13,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3319 [2021-06-12 20:00:13,687 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:13,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:13,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1944373539, now seen corresponding path program 451 times [2021-06-12 20:00:13,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:13,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906621877] [2021-06-12 20:00:13,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:13,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:13,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906621877] [2021-06-12 20:00:13,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906621877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:13,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865967762] [2021-06-12 20:00:13,809 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 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 [2021-06-12 20:00:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:13,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:13,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:14,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865967762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:14,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:14,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:14,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387672310] [2021-06-12 20:00:14,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:14,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:14,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:14,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:14,017 INFO L87 Difference]: Start difference. First operand 180 states and 387 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) [2021-06-12 20:00:14,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:14,363 INFO L93 Difference]: Finished difference Result 206 states and 438 transitions. [2021-06-12 20:00:14,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:00:14,363 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 [2021-06-12 20:00:14,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:14,363 INFO L225 Difference]: With dead ends: 206 [2021-06-12 20:00:14,363 INFO L226 Difference]: Without dead ends: 206 [2021-06-12 20:00:14,364 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 387.4ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:00:14,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-06-12 20:00:14,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 180. [2021-06-12 20:00:14,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1620111731843576) internal successors, (387), 179 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) [2021-06-12 20:00:14,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 387 transitions. [2021-06-12 20:00:14,365 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 387 transitions. Word has length 19 [2021-06-12 20:00:14,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:14,365 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 387 transitions. [2021-06-12 20:00:14,365 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) [2021-06-12 20:00:14,365 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 387 transitions. [2021-06-12 20:00:14,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:14,366 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:14,366 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:14,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3324 [2021-06-12 20:00:14,566 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:14,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:14,566 INFO L82 PathProgramCache]: Analyzing trace with hash 222508706, now seen corresponding path program 452 times [2021-06-12 20:00:14,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:14,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180643878] [2021-06-12 20:00:14,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:14,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:14,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180643878] [2021-06-12 20:00:14,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180643878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:14,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938982906] [2021-06-12 20:00:14,689 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 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 [2021-06-12 20:00:14,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:14,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:14,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:14,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:14,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938982906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:14,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:14,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:14,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557541248] [2021-06-12 20:00:14,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:14,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:14,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:14,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:14,942 INFO L87 Difference]: Start difference. First operand 180 states and 387 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) [2021-06-12 20:00:15,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:15,202 INFO L93 Difference]: Finished difference Result 221 states and 453 transitions. [2021-06-12 20:00:15,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:00:15,202 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 [2021-06-12 20:00:15,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:15,202 INFO L225 Difference]: With dead ends: 221 [2021-06-12 20:00:15,202 INFO L226 Difference]: Without dead ends: 217 [2021-06-12 20:00:15,202 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 391.3ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:00:15,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-12 20:00:15,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 183. [2021-06-12 20:00:15,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.17032967032967) internal successors, (395), 182 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) [2021-06-12 20:00:15,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 395 transitions. [2021-06-12 20:00:15,204 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 395 transitions. Word has length 19 [2021-06-12 20:00:15,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:15,204 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 395 transitions. [2021-06-12 20:00:15,204 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) [2021-06-12 20:00:15,204 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 395 transitions. [2021-06-12 20:00:15,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:15,204 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:15,204 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:15,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3329,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:15,405 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:15,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:15,405 INFO L82 PathProgramCache]: Analyzing trace with hash -20241694, now seen corresponding path program 453 times [2021-06-12 20:00:15,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:15,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353978351] [2021-06-12 20:00:15,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:15,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:15,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:15,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353978351] [2021-06-12 20:00:15,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353978351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:15,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628937626] [2021-06-12 20:00:15,526 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 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 [2021-06-12 20:00:15,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:00:15,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:15,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:00:15,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:15,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628937626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:15,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:15,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:15,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113418583] [2021-06-12 20:00:15,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:15,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:15,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:15,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:15,782 INFO L87 Difference]: Start difference. First operand 183 states and 395 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) [2021-06-12 20:00:16,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:16,038 INFO L93 Difference]: Finished difference Result 195 states and 416 transitions. [2021-06-12 20:00:16,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:00:16,038 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 [2021-06-12 20:00:16,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:16,039 INFO L225 Difference]: With dead ends: 195 [2021-06-12 20:00:16,039 INFO L226 Difference]: Without dead ends: 195 [2021-06-12 20:00:16,039 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 343.0ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:00:16,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-12 20:00:16,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 178. [2021-06-12 20:00:16,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.15819209039548) internal successors, (382), 177 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:16,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 382 transitions. [2021-06-12 20:00:16,040 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 382 transitions. Word has length 19 [2021-06-12 20:00:16,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:16,040 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 382 transitions. [2021-06-12 20:00:16,040 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) [2021-06-12 20:00:16,040 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 382 transitions. [2021-06-12 20:00:16,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:16,041 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:16,041 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:16,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3336 [2021-06-12 20:00:16,241 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:16,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:16,241 INFO L82 PathProgramCache]: Analyzing trace with hash -641291521, now seen corresponding path program 454 times [2021-06-12 20:00:16,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:16,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166260566] [2021-06-12 20:00:16,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:16,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:16,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:16,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166260566] [2021-06-12 20:00:16,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166260566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:16,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878859752] [2021-06-12 20:00:16,367 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 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 [2021-06-12 20:00:16,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:16,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:16,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:16,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:16,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878859752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:16,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:16,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:16,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410719512] [2021-06-12 20:00:16,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:16,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:16,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:16,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:16,643 INFO L87 Difference]: Start difference. First operand 178 states and 382 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) [2021-06-12 20:00:17,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:17,603 INFO L93 Difference]: Finished difference Result 290 states and 582 transitions. [2021-06-12 20:00:17,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:00:17,604 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 [2021-06-12 20:00:17,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:17,604 INFO L225 Difference]: With dead ends: 290 [2021-06-12 20:00:17,604 INFO L226 Difference]: Without dead ends: 290 [2021-06-12 20:00:17,604 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 975.4ms TimeCoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:00:17,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-06-12 20:00:17,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 183. [2021-06-12 20:00:17,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.17032967032967) internal successors, (395), 182 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) [2021-06-12 20:00:17,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 395 transitions. [2021-06-12 20:00:17,618 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 395 transitions. Word has length 19 [2021-06-12 20:00:17,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:17,618 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 395 transitions. [2021-06-12 20:00:17,618 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) [2021-06-12 20:00:17,619 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 395 transitions. [2021-06-12 20:00:17,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:17,619 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:17,619 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:17,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3344,455 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:17,825 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:17,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:17,825 INFO L82 PathProgramCache]: Analyzing trace with hash -353741286, now seen corresponding path program 455 times [2021-06-12 20:00:17,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:17,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109123404] [2021-06-12 20:00:17,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:17,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:17,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109123404] [2021-06-12 20:00:17,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109123404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:17,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825363000] [2021-06-12 20:00:17,947 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 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 [2021-06-12 20:00:17,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:00:17,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:17,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:17,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:18,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825363000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:18,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:18,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:18,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380634956] [2021-06-12 20:00:18,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:18,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:18,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:18,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:18,167 INFO L87 Difference]: Start difference. First operand 183 states and 395 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) [2021-06-12 20:00:18,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:18,679 INFO L93 Difference]: Finished difference Result 266 states and 543 transitions. [2021-06-12 20:00:18,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:00:18,679 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 [2021-06-12 20:00:18,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:18,680 INFO L225 Difference]: With dead ends: 266 [2021-06-12 20:00:18,680 INFO L226 Difference]: Without dead ends: 266 [2021-06-12 20:00:18,680 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 544.2ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:00:18,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-12 20:00:18,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 184. [2021-06-12 20:00:18,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.185792349726776) internal successors, (400), 183 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) [2021-06-12 20:00:18,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 400 transitions. [2021-06-12 20:00:18,682 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 400 transitions. Word has length 19 [2021-06-12 20:00:18,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:18,682 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 400 transitions. [2021-06-12 20:00:18,682 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) [2021-06-12 20:00:18,682 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 400 transitions. [2021-06-12 20:00:18,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:18,682 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:18,682 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:18,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3352 [2021-06-12 20:00:18,883 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:18,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:18,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1981190685, now seen corresponding path program 456 times [2021-06-12 20:00:18,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:18,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292077199] [2021-06-12 20:00:18,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:19,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:19,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:19,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292077199] [2021-06-12 20:00:19,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292077199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:19,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440982461] [2021-06-12 20:00:19,037 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 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 [2021-06-12 20:00:19,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:00:19,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:19,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:19,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:19,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440982461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:19,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:19,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:19,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384817259] [2021-06-12 20:00:19,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:19,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:19,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:19,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:19,314 INFO L87 Difference]: Start difference. First operand 184 states and 400 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) [2021-06-12 20:00:19,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:19,634 INFO L93 Difference]: Finished difference Result 203 states and 433 transitions. [2021-06-12 20:00:19,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:19,634 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 [2021-06-12 20:00:19,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:19,635 INFO L225 Difference]: With dead ends: 203 [2021-06-12 20:00:19,635 INFO L226 Difference]: Without dead ends: 197 [2021-06-12 20:00:19,635 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 500.0ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:00:19,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-12 20:00:19,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 184. [2021-06-12 20:00:19,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.180327868852459) internal successors, (399), 183 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) [2021-06-12 20:00:19,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 399 transitions. [2021-06-12 20:00:19,636 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 399 transitions. Word has length 19 [2021-06-12 20:00:19,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:19,636 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 399 transitions. [2021-06-12 20:00:19,636 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) [2021-06-12 20:00:19,637 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 399 transitions. [2021-06-12 20:00:19,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:19,637 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:19,637 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:19,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3359 [2021-06-12 20:00:19,837 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:19,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:19,837 INFO L82 PathProgramCache]: Analyzing trace with hash -51751006, now seen corresponding path program 457 times [2021-06-12 20:00:19,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:19,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482428673] [2021-06-12 20:00:19,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:19,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:19,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482428673] [2021-06-12 20:00:19,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482428673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:19,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362320332] [2021-06-12 20:00:19,957 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 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 [2021-06-12 20:00:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:19,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:19,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:20,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362320332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:20,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:20,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:20,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829520598] [2021-06-12 20:00:20,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:20,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:20,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:20,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:20,164 INFO L87 Difference]: Start difference. First operand 184 states and 399 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) [2021-06-12 20:00:20,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:20,399 INFO L93 Difference]: Finished difference Result 210 states and 448 transitions. [2021-06-12 20:00:20,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:20,399 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 [2021-06-12 20:00:20,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:20,399 INFO L225 Difference]: With dead ends: 210 [2021-06-12 20:00:20,399 INFO L226 Difference]: Without dead ends: 210 [2021-06-12 20:00:20,399 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 320.8ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:20,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-12 20:00:20,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 181. [2021-06-12 20:00:20,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.1666666666666665) internal successors, (390), 180 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) [2021-06-12 20:00:20,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 390 transitions. [2021-06-12 20:00:20,401 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 390 transitions. Word has length 19 [2021-06-12 20:00:20,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:20,401 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 390 transitions. [2021-06-12 20:00:20,401 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) [2021-06-12 20:00:20,401 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 390 transitions. [2021-06-12 20:00:20,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:20,401 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:20,401 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:20,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3367,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:20,602 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:20,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:20,602 INFO L82 PathProgramCache]: Analyzing trace with hash -2124426459, now seen corresponding path program 458 times [2021-06-12 20:00:20,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:20,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984536107] [2021-06-12 20:00:20,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:20,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:20,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984536107] [2021-06-12 20:00:20,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984536107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:20,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499847661] [2021-06-12 20:00:20,717 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 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 [2021-06-12 20:00:20,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:20,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:20,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:20,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:21,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499847661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:21,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:21,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:21,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703040518] [2021-06-12 20:00:21,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:21,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:21,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:21,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:21,003 INFO L87 Difference]: Start difference. First operand 181 states and 390 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) [2021-06-12 20:00:21,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:21,251 INFO L93 Difference]: Finished difference Result 193 states and 414 transitions. [2021-06-12 20:00:21,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:21,251 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 [2021-06-12 20:00:21,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:21,252 INFO L225 Difference]: With dead ends: 193 [2021-06-12 20:00:21,252 INFO L226 Difference]: Without dead ends: 193 [2021-06-12 20:00:21,252 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 352.0ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:21,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-12 20:00:21,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 184. [2021-06-12 20:00:21,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.1639344262295084) internal successors, (396), 183 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:21,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 396 transitions. [2021-06-12 20:00:21,254 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 396 transitions. Word has length 19 [2021-06-12 20:00:21,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:21,254 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 396 transitions. [2021-06-12 20:00:21,254 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) [2021-06-12 20:00:21,254 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 396 transitions. [2021-06-12 20:00:21,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:21,254 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:21,254 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:21,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3372,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:21,454 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:21,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:21,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1836876224, now seen corresponding path program 459 times [2021-06-12 20:00:21,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:21,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918791156] [2021-06-12 20:00:21,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:21,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:21,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:21,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918791156] [2021-06-12 20:00:21,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918791156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:21,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887416584] [2021-06-12 20:00:21,551 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 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 [2021-06-12 20:00:21,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:00:21,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:21,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 20:00:21,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:21,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:21,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887416584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:21,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:21,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:00:21,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029299634] [2021-06-12 20:00:21,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:00:21,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:21,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:00:21,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:21,790 INFO L87 Difference]: Start difference. First operand 184 states and 396 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) [2021-06-12 20:00:22,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:22,406 INFO L93 Difference]: Finished difference Result 276 states and 564 transitions. [2021-06-12 20:00:22,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:00:22,406 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 [2021-06-12 20:00:22,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:22,406 INFO L225 Difference]: With dead ends: 276 [2021-06-12 20:00:22,406 INFO L226 Difference]: Without dead ends: 276 [2021-06-12 20:00:22,407 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 620.8ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:00:22,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-06-12 20:00:22,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 186. [2021-06-12 20:00:22,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.1837837837837837) internal successors, (404), 185 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) [2021-06-12 20:00:22,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 404 transitions. [2021-06-12 20:00:22,408 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 404 transitions. Word has length 19 [2021-06-12 20:00:22,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:22,409 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 404 transitions. [2021-06-12 20:00:22,409 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) [2021-06-12 20:00:22,409 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 404 transitions. [2021-06-12 20:00:22,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:22,409 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:22,409 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:22,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3380,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:22,609 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:22,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:22,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1534885944, now seen corresponding path program 460 times [2021-06-12 20:00:22,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:22,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290527172] [2021-06-12 20:00:22,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:22,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:22,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290527172] [2021-06-12 20:00:22,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290527172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:22,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773925503] [2021-06-12 20:00:22,706 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 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 [2021-06-12 20:00:22,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:22,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:22,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:22,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:22,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773925503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:22,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:22,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:22,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036084744] [2021-06-12 20:00:22,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:22,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:22,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:22,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:22,924 INFO L87 Difference]: Start difference. First operand 186 states and 404 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) [2021-06-12 20:00:23,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:23,299 INFO L93 Difference]: Finished difference Result 228 states and 486 transitions. [2021-06-12 20:00:23,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:00:23,300 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 [2021-06-12 20:00:23,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:23,300 INFO L225 Difference]: With dead ends: 228 [2021-06-12 20:00:23,300 INFO L226 Difference]: Without dead ends: 228 [2021-06-12 20:00:23,300 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 431.2ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:00:23,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-12 20:00:23,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 185. [2021-06-12 20:00:23,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.1847826086956523) internal successors, (402), 184 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) [2021-06-12 20:00:23,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 402 transitions. [2021-06-12 20:00:23,302 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 402 transitions. Word has length 19 [2021-06-12 20:00:23,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:23,302 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 402 transitions. [2021-06-12 20:00:23,302 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) [2021-06-12 20:00:23,302 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 402 transitions. [2021-06-12 20:00:23,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:23,302 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:23,302 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:23,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3387,461 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:23,502 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:23,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:23,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1028539678, now seen corresponding path program 461 times [2021-06-12 20:00:23,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:23,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877841404] [2021-06-12 20:00:23,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:23,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:23,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877841404] [2021-06-12 20:00:23,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877841404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:23,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974585924] [2021-06-12 20:00:23,599 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 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 [2021-06-12 20:00:23,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:00:23,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:23,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 20:00:23,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:23,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974585924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:23,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:23,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:23,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574249711] [2021-06-12 20:00:23,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:23,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:23,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:23,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:23,840 INFO L87 Difference]: Start difference. First operand 185 states and 402 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) [2021-06-12 20:00:23,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:23,993 INFO L93 Difference]: Finished difference Result 222 states and 472 transitions. [2021-06-12 20:00:23,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:23,993 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 [2021-06-12 20:00:23,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:23,994 INFO L225 Difference]: With dead ends: 222 [2021-06-12 20:00:23,994 INFO L226 Difference]: Without dead ends: 222 [2021-06-12 20:00:23,994 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 245.2ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:23,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-12 20:00:23,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 181. [2021-06-12 20:00:23,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.1666666666666665) internal successors, (390), 180 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) [2021-06-12 20:00:23,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 390 transitions. [2021-06-12 20:00:23,996 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 390 transitions. Word has length 19 [2021-06-12 20:00:23,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:23,996 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 390 transitions. [2021-06-12 20:00:23,996 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) [2021-06-12 20:00:23,996 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 390 transitions. [2021-06-12 20:00:23,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:23,996 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:23,996 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:24,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3392 [2021-06-12 20:00:24,197 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:24,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:24,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1307906685, now seen corresponding path program 462 times [2021-06-12 20:00:24,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:24,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940744045] [2021-06-12 20:00:24,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:24,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:24,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940744045] [2021-06-12 20:00:24,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940744045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:24,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610265038] [2021-06-12 20:00:24,325 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 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 [2021-06-12 20:00:24,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:00:24,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:24,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:24,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:24,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610265038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:24,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:24,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:24,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686525909] [2021-06-12 20:00:24,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:24,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:24,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:24,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:24,536 INFO L87 Difference]: Start difference. First operand 181 states and 390 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) [2021-06-12 20:00:24,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:24,919 INFO L93 Difference]: Finished difference Result 205 states and 438 transitions. [2021-06-12 20:00:24,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:00:24,919 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 [2021-06-12 20:00:24,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:24,920 INFO L225 Difference]: With dead ends: 205 [2021-06-12 20:00:24,920 INFO L226 Difference]: Without dead ends: 205 [2021-06-12 20:00:24,920 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 423.6ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:00:24,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-12 20:00:24,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 181. [2021-06-12 20:00:24,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.1666666666666665) internal successors, (390), 180 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) [2021-06-12 20:00:24,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 390 transitions. [2021-06-12 20:00:24,921 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 390 transitions. Word has length 19 [2021-06-12 20:00:24,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:24,921 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 390 transitions. [2021-06-12 20:00:24,921 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) [2021-06-12 20:00:24,922 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 390 transitions. [2021-06-12 20:00:24,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:24,922 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:24,922 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:25,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3399,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:25,122 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:25,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:25,123 INFO L82 PathProgramCache]: Analyzing trace with hash -511170933, now seen corresponding path program 463 times [2021-06-12 20:00:25,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:25,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160804967] [2021-06-12 20:00:25,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:25,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:25,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160804967] [2021-06-12 20:00:25,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160804967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:25,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176443757] [2021-06-12 20:00:25,249 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 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 [2021-06-12 20:00:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:25,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:25,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:25,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:25,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176443757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:25,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:25,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:25,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335778880] [2021-06-12 20:00:25,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:25,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:25,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:25,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:25,460 INFO L87 Difference]: Start difference. First operand 181 states and 390 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) [2021-06-12 20:00:25,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:25,798 INFO L93 Difference]: Finished difference Result 221 states and 466 transitions. [2021-06-12 20:00:25,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:00:25,798 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 [2021-06-12 20:00:25,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:25,799 INFO L225 Difference]: With dead ends: 221 [2021-06-12 20:00:25,799 INFO L226 Difference]: Without dead ends: 218 [2021-06-12 20:00:25,799 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 400.5ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:00:25,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-12 20:00:25,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 181. [2021-06-12 20:00:25,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.161111111111111) internal successors, (389), 180 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) [2021-06-12 20:00:25,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 389 transitions. [2021-06-12 20:00:25,800 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 389 transitions. Word has length 19 [2021-06-12 20:00:25,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:25,801 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 389 transitions. [2021-06-12 20:00:25,801 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) [2021-06-12 20:00:25,801 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 389 transitions. [2021-06-12 20:00:25,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:25,801 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:25,801 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:26,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3404 [2021-06-12 20:00:26,001 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:26,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:26,002 INFO L82 PathProgramCache]: Analyzing trace with hash 616225160, now seen corresponding path program 464 times [2021-06-12 20:00:26,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:26,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133502012] [2021-06-12 20:00:26,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:26,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:26,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133502012] [2021-06-12 20:00:26,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133502012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:26,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35036135] [2021-06-12 20:00:26,125 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 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 [2021-06-12 20:00:26,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:26,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:26,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:26,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:26,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35036135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:26,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:26,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:26,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996616877] [2021-06-12 20:00:26,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:26,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:26,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:26,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:26,368 INFO L87 Difference]: Start difference. First operand 181 states and 389 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) [2021-06-12 20:00:26,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:26,635 INFO L93 Difference]: Finished difference Result 193 states and 412 transitions. [2021-06-12 20:00:26,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:00:26,635 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 [2021-06-12 20:00:26,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:26,636 INFO L225 Difference]: With dead ends: 193 [2021-06-12 20:00:26,636 INFO L226 Difference]: Without dead ends: 193 [2021-06-12 20:00:26,636 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 363.0ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:00:26,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-12 20:00:26,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 176. [2021-06-12 20:00:26,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.16) internal successors, (378), 175 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:26,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 378 transitions. [2021-06-12 20:00:26,637 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 378 transitions. Word has length 19 [2021-06-12 20:00:26,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:26,637 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 378 transitions. [2021-06-12 20:00:26,637 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) [2021-06-12 20:00:26,637 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 378 transitions. [2021-06-12 20:00:26,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:26,638 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:26,638 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:26,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3411,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:26,838 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:26,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:26,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1122571426, now seen corresponding path program 465 times [2021-06-12 20:00:26,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:26,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815224832] [2021-06-12 20:00:26,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:26,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:26,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:26,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815224832] [2021-06-12 20:00:26,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815224832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:26,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668245582] [2021-06-12 20:00:26,959 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 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 [2021-06-12 20:00:26,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:00:26,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:26,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 20:00:26,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:27,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668245582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:27,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:27,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:27,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259985805] [2021-06-12 20:00:27,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:27,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:27,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:27,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:27,176 INFO L87 Difference]: Start difference. First operand 176 states and 378 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) [2021-06-12 20:00:27,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:27,551 INFO L93 Difference]: Finished difference Result 244 states and 502 transitions. [2021-06-12 20:00:27,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:00:27,551 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 [2021-06-12 20:00:27,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:27,552 INFO L225 Difference]: With dead ends: 244 [2021-06-12 20:00:27,552 INFO L226 Difference]: Without dead ends: 244 [2021-06-12 20:00:27,552 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 392.3ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:00:27,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-12 20:00:27,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 183. [2021-06-12 20:00:27,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.17032967032967) internal successors, (395), 182 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) [2021-06-12 20:00:27,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 395 transitions. [2021-06-12 20:00:27,553 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 395 transitions. Word has length 19 [2021-06-12 20:00:27,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:27,553 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 395 transitions. [2021-06-12 20:00:27,553 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) [2021-06-12 20:00:27,554 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 395 transitions. [2021-06-12 20:00:27,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:27,554 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:27,554 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:27,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3419 [2021-06-12 20:00:27,754 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:27,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:27,754 INFO L82 PathProgramCache]: Analyzing trace with hash 584715848, now seen corresponding path program 466 times [2021-06-12 20:00:27,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:27,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056135456] [2021-06-12 20:00:27,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:27,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:27,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:27,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056135456] [2021-06-12 20:00:27,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056135456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:27,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659631129] [2021-06-12 20:00:27,883 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 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 [2021-06-12 20:00:27,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:27,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:27,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:27,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:28,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:28,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659631129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:28,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:28,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:28,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720856196] [2021-06-12 20:00:28,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:28,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:28,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:28,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:28,091 INFO L87 Difference]: Start difference. First operand 183 states and 395 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) [2021-06-12 20:00:28,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:28,310 INFO L93 Difference]: Finished difference Result 209 states and 444 transitions. [2021-06-12 20:00:28,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:00:28,310 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 [2021-06-12 20:00:28,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:28,310 INFO L225 Difference]: With dead ends: 209 [2021-06-12 20:00:28,310 INFO L226 Difference]: Without dead ends: 209 [2021-06-12 20:00:28,310 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 306.8ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:28,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-06-12 20:00:28,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 175. [2021-06-12 20:00:28,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.160919540229885) internal successors, (376), 174 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:28,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 376 transitions. [2021-06-12 20:00:28,312 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 376 transitions. Word has length 19 [2021-06-12 20:00:28,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:28,312 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 376 transitions. [2021-06-12 20:00:28,312 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) [2021-06-12 20:00:28,312 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 376 transitions. [2021-06-12 20:00:28,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:28,312 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:28,312 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:28,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3426,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:28,513 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:28,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:28,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1695154842, now seen corresponding path program 467 times [2021-06-12 20:00:28,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:28,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048887263] [2021-06-12 20:00:28,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:28,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:28,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048887263] [2021-06-12 20:00:28,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048887263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:28,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882601491] [2021-06-12 20:00:28,609 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 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 [2021-06-12 20:00:28,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:00:28,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:28,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:28,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:28,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882601491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:28,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:28,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:28,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770389072] [2021-06-12 20:00:28,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:28,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:28,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:28,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:28,845 INFO L87 Difference]: Start difference. First operand 175 states and 376 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) [2021-06-12 20:00:29,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:29,247 INFO L93 Difference]: Finished difference Result 227 states and 473 transitions. [2021-06-12 20:00:29,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:00:29,248 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 [2021-06-12 20:00:29,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:29,248 INFO L225 Difference]: With dead ends: 227 [2021-06-12 20:00:29,248 INFO L226 Difference]: Without dead ends: 225 [2021-06-12 20:00:29,248 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 474.0ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:00:29,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-12 20:00:29,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 180. [2021-06-12 20:00:29,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1675977653631286) internal successors, (388), 179 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:29,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 388 transitions. [2021-06-12 20:00:29,251 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 388 transitions. Word has length 19 [2021-06-12 20:00:29,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:29,251 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 388 transitions. [2021-06-12 20:00:29,251 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) [2021-06-12 20:00:29,251 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 388 transitions. [2021-06-12 20:00:29,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:29,252 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:29,252 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:29,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3431,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:29,452 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:29,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:29,452 INFO L82 PathProgramCache]: Analyzing trace with hash -360563512, now seen corresponding path program 468 times [2021-06-12 20:00:29,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:29,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438270833] [2021-06-12 20:00:29,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:29,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:29,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:29,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438270833] [2021-06-12 20:00:29,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438270833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:29,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984473068] [2021-06-12 20:00:29,549 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 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 [2021-06-12 20:00:29,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:00:29,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:29,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:29,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:29,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:29,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984473068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:29,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:29,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:29,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375067594] [2021-06-12 20:00:29,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:29,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:29,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:29,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:29,765 INFO L87 Difference]: Start difference. First operand 180 states and 388 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) [2021-06-12 20:00:30,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:30,227 INFO L93 Difference]: Finished difference Result 240 states and 500 transitions. [2021-06-12 20:00:30,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:00:30,227 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 [2021-06-12 20:00:30,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:30,228 INFO L225 Difference]: With dead ends: 240 [2021-06-12 20:00:30,228 INFO L226 Difference]: Without dead ends: 240 [2021-06-12 20:00:30,228 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 538.1ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:00:30,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-12 20:00:30,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 180. [2021-06-12 20:00:30,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1675977653631286) internal successors, (388), 179 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:30,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 388 transitions. [2021-06-12 20:00:30,229 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 388 transitions. Word has length 19 [2021-06-12 20:00:30,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:30,229 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 388 transitions. [2021-06-12 20:00:30,229 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) [2021-06-12 20:00:30,230 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 388 transitions. [2021-06-12 20:00:30,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:30,230 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:30,230 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:30,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3439,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:30,430 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:30,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:30,430 INFO L82 PathProgramCache]: Analyzing trace with hash -898419090, now seen corresponding path program 469 times [2021-06-12 20:00:30,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:30,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403053205] [2021-06-12 20:00:30,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:30,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:30,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403053205] [2021-06-12 20:00:30,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403053205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:30,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194903067] [2021-06-12 20:00:30,532 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 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 [2021-06-12 20:00:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:30,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:30,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:30,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194903067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:30,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:30,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:30,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455875092] [2021-06-12 20:00:30,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:30,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:30,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:30,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:30,749 INFO L87 Difference]: Start difference. First operand 180 states and 388 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) [2021-06-12 20:00:31,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:31,113 INFO L93 Difference]: Finished difference Result 222 states and 470 transitions. [2021-06-12 20:00:31,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:00:31,113 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 [2021-06-12 20:00:31,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:31,114 INFO L225 Difference]: With dead ends: 222 [2021-06-12 20:00:31,114 INFO L226 Difference]: Without dead ends: 222 [2021-06-12 20:00:31,114 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 468.5ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:00:31,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-12 20:00:31,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 180. [2021-06-12 20:00:31,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1675977653631286) internal successors, (388), 179 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:31,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 388 transitions. [2021-06-12 20:00:31,115 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 388 transitions. Word has length 19 [2021-06-12 20:00:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:31,115 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 388 transitions. [2021-06-12 20:00:31,116 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) [2021-06-12 20:00:31,116 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 388 transitions. [2021-06-12 20:00:31,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:31,116 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:31,116 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:31,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3446,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:31,316 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:31,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:31,317 INFO L82 PathProgramCache]: Analyzing trace with hash -392072824, now seen corresponding path program 470 times [2021-06-12 20:00:31,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:31,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597623275] [2021-06-12 20:00:31,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:31,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:31,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597623275] [2021-06-12 20:00:31,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597623275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:31,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776347741] [2021-06-12 20:00:31,416 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 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 [2021-06-12 20:00:31,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:31,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:31,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:31,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:31,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776347741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:31,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:31,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:31,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559681494] [2021-06-12 20:00:31,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:31,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:31,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:31,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:31,624 INFO L87 Difference]: Start difference. First operand 180 states and 388 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) [2021-06-12 20:00:31,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:31,853 INFO L93 Difference]: Finished difference Result 215 states and 455 transitions. [2021-06-12 20:00:31,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:00:31,854 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 [2021-06-12 20:00:31,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:31,854 INFO L225 Difference]: With dead ends: 215 [2021-06-12 20:00:31,854 INFO L226 Difference]: Without dead ends: 215 [2021-06-12 20:00:31,854 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 255.5ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:31,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-12 20:00:31,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 175. [2021-06-12 20:00:31,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1551724137931036) internal successors, (375), 174 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:31,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 375 transitions. [2021-06-12 20:00:31,856 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 375 transitions. Word has length 19 [2021-06-12 20:00:31,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:31,856 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 375 transitions. [2021-06-12 20:00:31,856 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) [2021-06-12 20:00:31,856 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 375 transitions. [2021-06-12 20:00:31,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:31,856 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:31,856 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:32,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3451 [2021-06-12 20:00:32,057 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:32,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:32,057 INFO L82 PathProgramCache]: Analyzing trace with hash -220502427, now seen corresponding path program 471 times [2021-06-12 20:00:32,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:32,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612717247] [2021-06-12 20:00:32,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:32,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:32,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:32,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612717247] [2021-06-12 20:00:32,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612717247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:32,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719429621] [2021-06-12 20:00:32,155 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 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 [2021-06-12 20:00:32,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:00:32,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:32,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:00:32,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:32,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719429621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:32,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:32,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:00:32,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579231707] [2021-06-12 20:00:32,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:00:32,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:32,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:00:32,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:32,465 INFO L87 Difference]: Start difference. First operand 175 states and 375 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) [2021-06-12 20:00:33,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:33,036 INFO L93 Difference]: Finished difference Result 199 states and 419 transitions. [2021-06-12 20:00:33,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:00:33,036 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 [2021-06-12 20:00:33,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:33,036 INFO L225 Difference]: With dead ends: 199 [2021-06-12 20:00:33,036 INFO L226 Difference]: Without dead ends: 187 [2021-06-12 20:00:33,036 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 666.2ms TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:00:33,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-12 20:00:33,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 179. [2021-06-12 20:00:33,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.151685393258427) internal successors, (383), 178 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) [2021-06-12 20:00:33,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 383 transitions. [2021-06-12 20:00:33,038 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 383 transitions. Word has length 19 [2021-06-12 20:00:33,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:33,038 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 383 transitions. [2021-06-12 20:00:33,038 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) [2021-06-12 20:00:33,039 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 383 transitions. [2021-06-12 20:00:33,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:33,039 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:33,039 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:33,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3456,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:33,239 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:33,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:33,240 INFO L82 PathProgramCache]: Analyzing trace with hash 67047808, now seen corresponding path program 472 times [2021-06-12 20:00:33,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:33,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028463917] [2021-06-12 20:00:33,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:33,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:33,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:33,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028463917] [2021-06-12 20:00:33,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028463917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:33,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26653640] [2021-06-12 20:00:33,338 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 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 [2021-06-12 20:00:33,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:33,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:33,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:33,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:33,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26653640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:33,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:33,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:00:33,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234306962] [2021-06-12 20:00:33,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:00:33,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:33,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:00:33,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:33,575 INFO L87 Difference]: Start difference. First operand 179 states and 383 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) [2021-06-12 20:00:34,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:34,440 INFO L93 Difference]: Finished difference Result 247 states and 509 transitions. [2021-06-12 20:00:34,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:00:34,441 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 [2021-06-12 20:00:34,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:34,441 INFO L225 Difference]: With dead ends: 247 [2021-06-12 20:00:34,441 INFO L226 Difference]: Without dead ends: 247 [2021-06-12 20:00:34,441 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 841.5ms TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:00:34,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-12 20:00:34,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 182. [2021-06-12 20:00:34,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.1767955801104972) internal successors, (394), 181 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) [2021-06-12 20:00:34,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 394 transitions. [2021-06-12 20:00:34,443 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 394 transitions. Word has length 19 [2021-06-12 20:00:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:34,443 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 394 transitions. [2021-06-12 20:00:34,443 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) [2021-06-12 20:00:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 394 transitions. [2021-06-12 20:00:34,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:34,443 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:34,443 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:34,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3464,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:34,644 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:34,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:34,644 INFO L82 PathProgramCache]: Analyzing trace with hash 369038088, now seen corresponding path program 473 times [2021-06-12 20:00:34,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:34,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212617420] [2021-06-12 20:00:34,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:34,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:34,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212617420] [2021-06-12 20:00:34,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212617420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:34,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559863391] [2021-06-12 20:00:34,743 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 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 [2021-06-12 20:00:34,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:00:34,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:34,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:00:34,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:35,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559863391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:35,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:35,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:00:35,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213171531] [2021-06-12 20:00:35,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:00:35,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:35,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:00:35,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:35,066 INFO L87 Difference]: Start difference. First operand 182 states and 394 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) [2021-06-12 20:00:35,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:35,675 INFO L93 Difference]: Finished difference Result 227 states and 481 transitions. [2021-06-12 20:00:35,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:00:35,675 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 [2021-06-12 20:00:35,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:35,676 INFO L225 Difference]: With dead ends: 227 [2021-06-12 20:00:35,676 INFO L226 Difference]: Without dead ends: 227 [2021-06-12 20:00:35,676 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 712.2ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:00:35,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-12 20:00:35,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 181. [2021-06-12 20:00:35,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.1777777777777776) internal successors, (392), 180 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) [2021-06-12 20:00:35,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 392 transitions. [2021-06-12 20:00:35,678 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 392 transitions. Word has length 19 [2021-06-12 20:00:35,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:35,678 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 392 transitions. [2021-06-12 20:00:35,678 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) [2021-06-12 20:00:35,678 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 392 transitions. [2021-06-12 20:00:35,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:35,678 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:35,678 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:35,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3471 [2021-06-12 20:00:35,879 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:35,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:35,879 INFO L82 PathProgramCache]: Analyzing trace with hash 875384354, now seen corresponding path program 474 times [2021-06-12 20:00:35,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:35,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168025636] [2021-06-12 20:00:35,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:35,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:35,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:35,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168025636] [2021-06-12 20:00:35,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168025636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:35,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087263251] [2021-06-12 20:00:35,976 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 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 [2021-06-12 20:00:36,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:00:36,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:36,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:36,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:36,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087263251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:36,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:36,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:00:36,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312804326] [2021-06-12 20:00:36,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:00:36,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:36,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:00:36,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:36,207 INFO L87 Difference]: Start difference. First operand 181 states and 392 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) [2021-06-12 20:00:36,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:36,724 INFO L93 Difference]: Finished difference Result 224 states and 476 transitions. [2021-06-12 20:00:36,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:00:36,724 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 [2021-06-12 20:00:36,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:36,724 INFO L225 Difference]: With dead ends: 224 [2021-06-12 20:00:36,724 INFO L226 Difference]: Without dead ends: 224 [2021-06-12 20:00:36,724 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 594.7ms TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:00:36,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-12 20:00:36,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 180. [2021-06-12 20:00:36,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.17877094972067) internal successors, (390), 179 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) [2021-06-12 20:00:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 390 transitions. [2021-06-12 20:00:36,726 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 390 transitions. Word has length 19 [2021-06-12 20:00:36,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:36,726 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 390 transitions. [2021-06-12 20:00:36,726 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) [2021-06-12 20:00:36,726 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 390 transitions. [2021-06-12 20:00:36,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:36,727 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:36,727 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:36,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3478,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:36,927 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:36,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:36,927 INFO L82 PathProgramCache]: Analyzing trace with hash -607750584, now seen corresponding path program 475 times [2021-06-12 20:00:36,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:36,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547981984] [2021-06-12 20:00:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:37,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:37,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547981984] [2021-06-12 20:00:37,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547981984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:37,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795190507] [2021-06-12 20:00:37,021 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 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 [2021-06-12 20:00:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:37,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:37,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:37,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795190507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:37,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:37,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:00:37,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520857571] [2021-06-12 20:00:37,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:00:37,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:37,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:00:37,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:37,234 INFO L87 Difference]: Start difference. First operand 180 states and 390 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) [2021-06-12 20:00:37,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:37,541 INFO L93 Difference]: Finished difference Result 204 states and 433 transitions. [2021-06-12 20:00:37,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:00:37,541 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 [2021-06-12 20:00:37,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:37,541 INFO L225 Difference]: With dead ends: 204 [2021-06-12 20:00:37,541 INFO L226 Difference]: Without dead ends: 204 [2021-06-12 20:00:37,542 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 374.0ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:00:37,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-12 20:00:37,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 175. [2021-06-12 20:00:37,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1551724137931036) internal successors, (375), 174 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:37,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 375 transitions. [2021-06-12 20:00:37,543 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 375 transitions. Word has length 19 [2021-06-12 20:00:37,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:37,543 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 375 transitions. [2021-06-12 20:00:37,543 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) [2021-06-12 20:00:37,543 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 375 transitions. [2021-06-12 20:00:37,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:37,544 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:37,544 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:37,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3483 [2021-06-12 20:00:37,744 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:37,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:37,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1039160257, now seen corresponding path program 476 times [2021-06-12 20:00:37,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:37,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098522255] [2021-06-12 20:00:37,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:37,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:37,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098522255] [2021-06-12 20:00:37,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098522255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:37,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529262970] [2021-06-12 20:00:37,867 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 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 [2021-06-12 20:00:37,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:37,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:37,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 20:00:37,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:38,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:38,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529262970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:38,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:38,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:38,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191172491] [2021-06-12 20:00:38,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:38,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:38,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:38,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:38,115 INFO L87 Difference]: Start difference. First operand 175 states and 375 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) [2021-06-12 20:00:38,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:38,533 INFO L93 Difference]: Finished difference Result 211 states and 445 transitions. [2021-06-12 20:00:38,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:00:38,534 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 [2021-06-12 20:00:38,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:38,534 INFO L225 Difference]: With dead ends: 211 [2021-06-12 20:00:38,534 INFO L226 Difference]: Without dead ends: 211 [2021-06-12 20:00:38,534 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 496.0ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:00:38,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-12 20:00:38,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 175. [2021-06-12 20:00:38,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1551724137931036) internal successors, (375), 174 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:38,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 375 transitions. [2021-06-12 20:00:38,536 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 375 transitions. Word has length 19 [2021-06-12 20:00:38,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:38,536 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 375 transitions. [2021-06-12 20:00:38,536 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) [2021-06-12 20:00:38,536 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 375 transitions. [2021-06-12 20:00:38,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:38,536 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:38,536 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:38,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3488,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:38,736 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:38,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:38,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1127721988, now seen corresponding path program 477 times [2021-06-12 20:00:38,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:38,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960036367] [2021-06-12 20:00:38,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:38,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:38,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960036367] [2021-06-12 20:00:38,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960036367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:38,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945532877] [2021-06-12 20:00:38,857 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 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 [2021-06-12 20:00:38,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:00:38,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:38,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:38,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:39,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945532877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:39,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:39,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:39,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753657839] [2021-06-12 20:00:39,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:39,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:39,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:39,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:39,109 INFO L87 Difference]: Start difference. First operand 175 states and 375 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) [2021-06-12 20:00:39,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:39,552 INFO L93 Difference]: Finished difference Result 213 states and 439 transitions. [2021-06-12 20:00:39,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:00:39,553 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 [2021-06-12 20:00:39,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:39,553 INFO L225 Difference]: With dead ends: 213 [2021-06-12 20:00:39,553 INFO L226 Difference]: Without dead ends: 207 [2021-06-12 20:00:39,553 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 512.8ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:00:39,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-12 20:00:39,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 175. [2021-06-12 20:00:39,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.132183908045977) internal successors, (371), 174 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:39,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 371 transitions. [2021-06-12 20:00:39,555 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 371 transitions. Word has length 19 [2021-06-12 20:00:39,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:39,555 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 371 transitions. [2021-06-12 20:00:39,555 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) [2021-06-12 20:00:39,555 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 371 transitions. [2021-06-12 20:00:39,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:39,555 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:39,555 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:39,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3492 [2021-06-12 20:00:39,756 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:39,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:39,756 INFO L82 PathProgramCache]: Analyzing trace with hash -242424505, now seen corresponding path program 478 times [2021-06-12 20:00:39,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:39,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148498973] [2021-06-12 20:00:39,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:39,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:39,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148498973] [2021-06-12 20:00:39,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148498973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:39,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128228134] [2021-06-12 20:00:39,883 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 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 [2021-06-12 20:00:39,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:39,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:39,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:39,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:40,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:40,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128228134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:40,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:40,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:40,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281266560] [2021-06-12 20:00:40,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:40,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:40,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:40,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:40,092 INFO L87 Difference]: Start difference. First operand 175 states and 371 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) [2021-06-12 20:00:40,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:40,588 INFO L93 Difference]: Finished difference Result 220 states and 456 transitions. [2021-06-12 20:00:40,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:00:40,589 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 [2021-06-12 20:00:40,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:40,589 INFO L225 Difference]: With dead ends: 220 [2021-06-12 20:00:40,589 INFO L226 Difference]: Without dead ends: 217 [2021-06-12 20:00:40,589 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 512.7ms TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:00:40,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-12 20:00:40,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 175. [2021-06-12 20:00:40,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1264367816091956) internal successors, (370), 174 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) [2021-06-12 20:00:40,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 370 transitions. [2021-06-12 20:00:40,591 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 370 transitions. Word has length 19 [2021-06-12 20:00:40,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:40,591 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 370 transitions. [2021-06-12 20:00:40,591 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) [2021-06-12 20:00:40,591 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 370 transitions. [2021-06-12 20:00:40,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:40,591 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:40,591 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:40,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3499,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:40,792 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:40,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:40,792 INFO L82 PathProgramCache]: Analyzing trace with hash 884971588, now seen corresponding path program 479 times [2021-06-12 20:00:40,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:40,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001311686] [2021-06-12 20:00:40,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:40,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:40,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001311686] [2021-06-12 20:00:40,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001311686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:40,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305936597] [2021-06-12 20:00:40,912 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 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 [2021-06-12 20:00:40,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:00:40,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:40,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:40,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:41,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305936597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:41,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:41,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:41,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318821002] [2021-06-12 20:00:41,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:41,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:41,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:41,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:41,160 INFO L87 Difference]: Start difference. First operand 175 states and 370 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) [2021-06-12 20:00:41,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:41,442 INFO L93 Difference]: Finished difference Result 196 states and 410 transitions. [2021-06-12 20:00:41,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:00:41,442 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 [2021-06-12 20:00:41,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:41,442 INFO L225 Difference]: With dead ends: 196 [2021-06-12 20:00:41,442 INFO L226 Difference]: Without dead ends: 196 [2021-06-12 20:00:41,443 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 409.4ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:00:41,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-12 20:00:41,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 170. [2021-06-12 20:00:41,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1242603550295858) internal successors, (359), 169 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) [2021-06-12 20:00:41,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 359 transitions. [2021-06-12 20:00:41,444 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 359 transitions. Word has length 19 [2021-06-12 20:00:41,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:41,444 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 359 transitions. [2021-06-12 20:00:41,444 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) [2021-06-12 20:00:41,444 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 359 transitions. [2021-06-12 20:00:41,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:41,444 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:41,445 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:41,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3506 [2021-06-12 20:00:41,645 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:41,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:41,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1391317854, now seen corresponding path program 480 times [2021-06-12 20:00:41,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:41,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702918327] [2021-06-12 20:00:41,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:41,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:41,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:41,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702918327] [2021-06-12 20:00:41,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702918327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:41,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628398820] [2021-06-12 20:00:41,766 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 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 [2021-06-12 20:00:41,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:00:41,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:41,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:41,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:41,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628398820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:41,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:41,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:41,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119700784] [2021-06-12 20:00:41,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:41,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:41,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:41,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:41,978 INFO L87 Difference]: Start difference. First operand 170 states and 359 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) [2021-06-12 20:00:42,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:42,354 INFO L93 Difference]: Finished difference Result 242 states and 497 transitions. [2021-06-12 20:00:42,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:00:42,354 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 [2021-06-12 20:00:42,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:42,355 INFO L225 Difference]: With dead ends: 242 [2021-06-12 20:00:42,355 INFO L226 Difference]: Without dead ends: 242 [2021-06-12 20:00:42,355 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 401.0ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:00:42,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-12 20:00:42,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 174. [2021-06-12 20:00:42,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.132947976878613) internal successors, (369), 173 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:42,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 369 transitions. [2021-06-12 20:00:42,357 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 369 transitions. Word has length 19 [2021-06-12 20:00:42,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:42,357 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 369 transitions. [2021-06-12 20:00:42,357 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) [2021-06-12 20:00:42,357 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 369 transitions. [2021-06-12 20:00:42,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:42,357 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:42,357 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:42,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3514,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:42,558 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:42,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:42,558 INFO L82 PathProgramCache]: Analyzing trace with hash 853462276, now seen corresponding path program 481 times [2021-06-12 20:00:42,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:42,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864368642] [2021-06-12 20:00:42,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:42,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:42,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864368642] [2021-06-12 20:00:42,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864368642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:42,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949369508] [2021-06-12 20:00:42,683 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 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 [2021-06-12 20:00:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:42,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:42,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:42,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949369508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:42,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:42,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:42,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184447508] [2021-06-12 20:00:42,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:42,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:42,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:42,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:42,889 INFO L87 Difference]: Start difference. First operand 174 states and 369 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) [2021-06-12 20:00:43,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:43,350 INFO L93 Difference]: Finished difference Result 210 states and 438 transitions. [2021-06-12 20:00:43,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:00:43,350 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 [2021-06-12 20:00:43,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:43,351 INFO L225 Difference]: With dead ends: 210 [2021-06-12 20:00:43,351 INFO L226 Difference]: Without dead ends: 210 [2021-06-12 20:00:43,351 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 468.5ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:00:43,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-12 20:00:43,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 170. [2021-06-12 20:00:43,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1242603550295858) internal successors, (359), 169 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) [2021-06-12 20:00:43,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 359 transitions. [2021-06-12 20:00:43,352 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 359 transitions. Word has length 19 [2021-06-12 20:00:43,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:43,352 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 359 transitions. [2021-06-12 20:00:43,352 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) [2021-06-12 20:00:43,352 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 359 transitions. [2021-06-12 20:00:43,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:43,353 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:43,353 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:43,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3521,482 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:43,553 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:43,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:43,553 INFO L82 PathProgramCache]: Analyzing trace with hash -91817084, now seen corresponding path program 482 times [2021-06-12 20:00:43,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:43,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303948637] [2021-06-12 20:00:43,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:43,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:43,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:43,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:43,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303948637] [2021-06-12 20:00:43,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303948637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:43,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986567568] [2021-06-12 20:00:43,651 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 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 [2021-06-12 20:00:43,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:43,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:43,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:43,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:43,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986567568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:43,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:43,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:43,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637645483] [2021-06-12 20:00:43,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:43,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:43,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:43,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:43,863 INFO L87 Difference]: Start difference. First operand 170 states and 359 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) [2021-06-12 20:00:44,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:44,436 INFO L93 Difference]: Finished difference Result 251 states and 508 transitions. [2021-06-12 20:00:44,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:00:44,436 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 [2021-06-12 20:00:44,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:44,437 INFO L225 Difference]: With dead ends: 251 [2021-06-12 20:00:44,437 INFO L226 Difference]: Without dead ends: 251 [2021-06-12 20:00:44,437 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 537.0ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:00:44,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-12 20:00:44,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 176. [2021-06-12 20:00:44,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.142857142857143) internal successors, (375), 175 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:44,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 375 transitions. [2021-06-12 20:00:44,439 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 375 transitions. Word has length 19 [2021-06-12 20:00:44,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:44,439 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 375 transitions. [2021-06-12 20:00:44,439 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) [2021-06-12 20:00:44,439 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 375 transitions. [2021-06-12 20:00:44,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:44,439 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:44,439 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:44,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3526,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:44,639 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:44,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:44,640 INFO L82 PathProgramCache]: Analyzing trace with hash -629672662, now seen corresponding path program 483 times [2021-06-12 20:00:44,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:44,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961767001] [2021-06-12 20:00:44,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:44,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:44,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961767001] [2021-06-12 20:00:44,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961767001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:44,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369044553] [2021-06-12 20:00:44,739 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 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 [2021-06-12 20:00:44,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:00:44,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:44,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:44,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:44,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369044553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:44,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:44,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:44,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676554229] [2021-06-12 20:00:44,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:44,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:44,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:44,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:44,964 INFO L87 Difference]: Start difference. First operand 176 states and 375 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) [2021-06-12 20:00:45,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:45,361 INFO L93 Difference]: Finished difference Result 230 states and 480 transitions. [2021-06-12 20:00:45,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:00:45,361 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 [2021-06-12 20:00:45,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:45,361 INFO L225 Difference]: With dead ends: 230 [2021-06-12 20:00:45,361 INFO L226 Difference]: Without dead ends: 230 [2021-06-12 20:00:45,361 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 415.7ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:00:45,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-12 20:00:45,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 175. [2021-06-12 20:00:45,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1436781609195403) internal successors, (373), 174 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:45,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 373 transitions. [2021-06-12 20:00:45,363 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 373 transitions. Word has length 19 [2021-06-12 20:00:45,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:45,363 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 373 transitions. [2021-06-12 20:00:45,363 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) [2021-06-12 20:00:45,363 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 373 transitions. [2021-06-12 20:00:45,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:45,363 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:45,363 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:45,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3533,484 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:45,564 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:45,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:45,564 INFO L82 PathProgramCache]: Analyzing trace with hash -123326396, now seen corresponding path program 484 times [2021-06-12 20:00:45,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:45,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547916306] [2021-06-12 20:00:45,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:45,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:45,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:45,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547916306] [2021-06-12 20:00:45,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547916306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:45,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357787025] [2021-06-12 20:00:45,660 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 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 [2021-06-12 20:00:45,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:45,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:45,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:45,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:45,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357787025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:45,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:45,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:00:45,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774338582] [2021-06-12 20:00:45,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:45,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:45,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:45,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:45,866 INFO L87 Difference]: Start difference. First operand 175 states and 373 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) [2021-06-12 20:00:46,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:46,183 INFO L93 Difference]: Finished difference Result 213 states and 444 transitions. [2021-06-12 20:00:46,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:00:46,183 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 [2021-06-12 20:00:46,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:46,183 INFO L225 Difference]: With dead ends: 213 [2021-06-12 20:00:46,183 INFO L226 Difference]: Without dead ends: 213 [2021-06-12 20:00:46,184 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 332.5ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:46,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-12 20:00:46,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 167. [2021-06-12 20:00:46,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1265060240963853) internal successors, (353), 166 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:46,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 353 transitions. [2021-06-12 20:00:46,185 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 353 transitions. Word has length 19 [2021-06-12 20:00:46,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:46,185 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 353 transitions. [2021-06-12 20:00:46,185 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) [2021-06-12 20:00:46,185 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 353 transitions. [2021-06-12 20:00:46,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:46,186 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:46,186 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:46,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3538,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:46,386 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:46,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:46,386 INFO L82 PathProgramCache]: Analyzing trace with hash 48244001, now seen corresponding path program 485 times [2021-06-12 20:00:46,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:46,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085980952] [2021-06-12 20:00:46,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:46,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:46,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:46,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085980952] [2021-06-12 20:00:46,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085980952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:46,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253720432] [2021-06-12 20:00:46,482 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 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 [2021-06-12 20:00:46,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:00:46,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:46,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:46,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:46,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253720432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:46,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:46,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:00:46,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790592565] [2021-06-12 20:00:46,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:00:46,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:46,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:00:46,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:46,791 INFO L87 Difference]: Start difference. First operand 167 states and 353 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) [2021-06-12 20:00:47,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:47,281 INFO L93 Difference]: Finished difference Result 185 states and 381 transitions. [2021-06-12 20:00:47,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:00:47,281 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 [2021-06-12 20:00:47,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:47,281 INFO L225 Difference]: With dead ends: 185 [2021-06-12 20:00:47,281 INFO L226 Difference]: Without dead ends: 173 [2021-06-12 20:00:47,282 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 617.6ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:00:47,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-12 20:00:47,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 168. [2021-06-12 20:00:47,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.1077844311377247) internal successors, (352), 167 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:47,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 352 transitions. [2021-06-12 20:00:47,283 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 352 transitions. Word has length 19 [2021-06-12 20:00:47,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:47,283 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 352 transitions. [2021-06-12 20:00:47,283 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) [2021-06-12 20:00:47,283 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 352 transitions. [2021-06-12 20:00:47,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:47,283 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:47,283 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:47,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3543,486 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:47,484 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:47,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:47,484 INFO L82 PathProgramCache]: Analyzing trace with hash 335794236, now seen corresponding path program 486 times [2021-06-12 20:00:47,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:47,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511346208] [2021-06-12 20:00:47,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:47,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:47,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:47,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511346208] [2021-06-12 20:00:47,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511346208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:47,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592675921] [2021-06-12 20:00:47,580 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 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 [2021-06-12 20:00:47,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:00:47,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:47,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:47,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:47,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592675921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:47,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:47,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:00:47,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907159031] [2021-06-12 20:00:47,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:00:47,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:47,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:00:47,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:47,820 INFO L87 Difference]: Start difference. First operand 168 states and 352 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) [2021-06-12 20:00:48,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:48,559 INFO L93 Difference]: Finished difference Result 231 states and 460 transitions. [2021-06-12 20:00:48,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:00:48,560 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 [2021-06-12 20:00:48,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:48,560 INFO L225 Difference]: With dead ends: 231 [2021-06-12 20:00:48,560 INFO L226 Difference]: Without dead ends: 231 [2021-06-12 20:00:48,560 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 734.6ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:00:48,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-12 20:00:48,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 173. [2021-06-12 20:00:48,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.13953488372093) internal successors, (368), 172 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:48,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 368 transitions. [2021-06-12 20:00:48,562 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 368 transitions. Word has length 19 [2021-06-12 20:00:48,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:48,562 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 368 transitions. [2021-06-12 20:00:48,562 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) [2021-06-12 20:00:48,562 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 368 transitions. [2021-06-12 20:00:48,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:48,562 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:48,562 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:48,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 487 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3551 [2021-06-12 20:00:48,763 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:48,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:48,763 INFO L82 PathProgramCache]: Analyzing trace with hash 637784516, now seen corresponding path program 487 times [2021-06-12 20:00:48,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:48,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469828381] [2021-06-12 20:00:48,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:48,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:48,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469828381] [2021-06-12 20:00:48,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469828381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:48,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432170690] [2021-06-12 20:00:48,878 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 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 [2021-06-12 20:00:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:48,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:48,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:49,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432170690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:49,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:49,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:00:49,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617816991] [2021-06-12 20:00:49,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:00:49,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:49,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:00:49,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:49,113 INFO L87 Difference]: Start difference. First operand 173 states and 368 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) [2021-06-12 20:00:49,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:49,493 INFO L93 Difference]: Finished difference Result 205 states and 428 transitions. [2021-06-12 20:00:49,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:00:49,494 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 [2021-06-12 20:00:49,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:49,494 INFO L225 Difference]: With dead ends: 205 [2021-06-12 20:00:49,494 INFO L226 Difference]: Without dead ends: 205 [2021-06-12 20:00:49,494 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 444.7ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:00:49,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-12 20:00:49,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 172. [2021-06-12 20:00:49,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.1403508771929824) internal successors, (366), 171 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) [2021-06-12 20:00:49,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 366 transitions. [2021-06-12 20:00:49,496 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 366 transitions. Word has length 19 [2021-06-12 20:00:49,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:49,496 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 366 transitions. [2021-06-12 20:00:49,496 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) [2021-06-12 20:00:49,496 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 366 transitions. [2021-06-12 20:00:49,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:49,496 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:49,496 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:49,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3558 [2021-06-12 20:00:49,697 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:49,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:49,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1144130782, now seen corresponding path program 488 times [2021-06-12 20:00:49,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:49,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259193029] [2021-06-12 20:00:49,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:49,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:49,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:49,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259193029] [2021-06-12 20:00:49,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259193029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:49,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105470373] [2021-06-12 20:00:49,797 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 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 [2021-06-12 20:00:49,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:49,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:49,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:49,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:50,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:50,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105470373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:50,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:50,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:00:50,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567869686] [2021-06-12 20:00:50,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:00:50,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:50,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:00:50,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:50,023 INFO L87 Difference]: Start difference. First operand 172 states and 366 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) [2021-06-12 20:00:50,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:50,389 INFO L93 Difference]: Finished difference Result 217 states and 453 transitions. [2021-06-12 20:00:50,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:00:50,390 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 [2021-06-12 20:00:50,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:50,390 INFO L225 Difference]: With dead ends: 217 [2021-06-12 20:00:50,390 INFO L226 Difference]: Without dead ends: 217 [2021-06-12 20:00:50,390 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 425.5ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:00:50,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-12 20:00:50,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 171. [2021-06-12 20:00:50,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.1411764705882352) internal successors, (364), 170 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) [2021-06-12 20:00:50,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 364 transitions. [2021-06-12 20:00:50,392 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 364 transitions. Word has length 19 [2021-06-12 20:00:50,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:50,392 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 364 transitions. [2021-06-12 20:00:50,392 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) [2021-06-12 20:00:50,392 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 364 transitions. [2021-06-12 20:00:50,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:50,392 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:50,392 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:50,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3563,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:50,593 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:50,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:50,593 INFO L82 PathProgramCache]: Analyzing trace with hash -339004156, now seen corresponding path program 489 times [2021-06-12 20:00:50,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:50,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883177202] [2021-06-12 20:00:50,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:50,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:50,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:50,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883177202] [2021-06-12 20:00:50,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883177202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:50,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674118135] [2021-06-12 20:00:50,691 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 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 [2021-06-12 20:00:50,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:00:50,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:50,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:50,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:50,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674118135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:50,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:50,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:00:50,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304150151] [2021-06-12 20:00:50,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:00:50,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:50,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:00:50,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:50,908 INFO L87 Difference]: Start difference. First operand 171 states and 364 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) [2021-06-12 20:00:51,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:51,279 INFO L93 Difference]: Finished difference Result 200 states and 415 transitions. [2021-06-12 20:00:51,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:00:51,279 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 [2021-06-12 20:00:51,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:51,280 INFO L225 Difference]: With dead ends: 200 [2021-06-12 20:00:51,280 INFO L226 Difference]: Without dead ends: 200 [2021-06-12 20:00:51,280 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 415.1ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:00:51,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-12 20:00:51,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 164. [2021-06-12 20:00:51,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1104294478527605) internal successors, (344), 163 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:51,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 344 transitions. [2021-06-12 20:00:51,281 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 344 transitions. Word has length 19 [2021-06-12 20:00:51,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:51,281 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 344 transitions. [2021-06-12 20:00:51,281 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) [2021-06-12 20:00:51,281 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 344 transitions. [2021-06-12 20:00:51,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:51,282 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:51,282 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:51,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3568 [2021-06-12 20:00:51,482 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:51,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:51,482 INFO L82 PathProgramCache]: Analyzing trace with hash 472555237, now seen corresponding path program 490 times [2021-06-12 20:00:51,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:51,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440721293] [2021-06-12 20:00:51,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:51,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:51,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440721293] [2021-06-12 20:00:51,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440721293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:51,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883173449] [2021-06-12 20:00:51,579 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 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 [2021-06-12 20:00:51,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:51,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:51,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:51,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:51,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883173449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:51,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:51,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:00:51,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149793312] [2021-06-12 20:00:51,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:00:51,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:51,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:00:51,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:51,894 INFO L87 Difference]: Start difference. First operand 164 states and 344 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) [2021-06-12 20:00:52,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:52,445 INFO L93 Difference]: Finished difference Result 195 states and 398 transitions. [2021-06-12 20:00:52,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:00:52,445 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 [2021-06-12 20:00:52,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:52,445 INFO L225 Difference]: With dead ends: 195 [2021-06-12 20:00:52,445 INFO L226 Difference]: Without dead ends: 195 [2021-06-12 20:00:52,445 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 693.5ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:00:52,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-12 20:00:52,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 164. [2021-06-12 20:00:52,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1104294478527605) internal successors, (344), 163 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:52,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 344 transitions. [2021-06-12 20:00:52,447 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 344 transitions. Word has length 19 [2021-06-12 20:00:52,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:52,447 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 344 transitions. [2021-06-12 20:00:52,447 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) [2021-06-12 20:00:52,447 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 344 transitions. [2021-06-12 20:00:52,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:52,447 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:52,447 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:52,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3573,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:52,648 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:52,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:52,648 INFO L82 PathProgramCache]: Analyzing trace with hash 760105472, now seen corresponding path program 491 times [2021-06-12 20:00:52,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:52,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967512300] [2021-06-12 20:00:52,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:52,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:52,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:52,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967512300] [2021-06-12 20:00:52,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967512300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:52,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733534888] [2021-06-12 20:00:52,740 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 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 [2021-06-12 20:00:52,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:00:52,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:52,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:52,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:52,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733534888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:52,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:52,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:00:52,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592790957] [2021-06-12 20:00:52,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:00:52,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:52,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:00:52,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:52,983 INFO L87 Difference]: Start difference. First operand 164 states and 344 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) [2021-06-12 20:00:53,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:53,711 INFO L93 Difference]: Finished difference Result 228 states and 458 transitions. [2021-06-12 20:00:53,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:00:53,711 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 [2021-06-12 20:00:53,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:53,712 INFO L225 Difference]: With dead ends: 228 [2021-06-12 20:00:53,712 INFO L226 Difference]: Without dead ends: 228 [2021-06-12 20:00:53,712 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 726.5ms TimeCoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:00:53,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-12 20:00:53,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 168. [2021-06-12 20:00:53,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.1197604790419162) internal successors, (354), 167 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:53,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 354 transitions. [2021-06-12 20:00:53,713 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 354 transitions. Word has length 19 [2021-06-12 20:00:53,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:53,713 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 354 transitions. [2021-06-12 20:00:53,714 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) [2021-06-12 20:00:53,714 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 354 transitions. [2021-06-12 20:00:53,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:53,714 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:53,714 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:53,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3581 [2021-06-12 20:00:53,914 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:53,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:53,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1062095752, now seen corresponding path program 492 times [2021-06-12 20:00:53,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:53,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130565462] [2021-06-12 20:00:53,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:54,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:54,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130565462] [2021-06-12 20:00:54,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130565462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:54,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9717035] [2021-06-12 20:00:54,009 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 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 [2021-06-12 20:00:54,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:00:54,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:54,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:54,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:54,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:54,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9717035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:54,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:54,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:00:54,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127634456] [2021-06-12 20:00:54,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:00:54,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:54,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:00:54,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:54,248 INFO L87 Difference]: Start difference. First operand 168 states and 354 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) [2021-06-12 20:00:54,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:54,878 INFO L93 Difference]: Finished difference Result 226 states and 459 transitions. [2021-06-12 20:00:54,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:00:54,879 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 [2021-06-12 20:00:54,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:54,879 INFO L225 Difference]: With dead ends: 226 [2021-06-12 20:00:54,879 INFO L226 Difference]: Without dead ends: 226 [2021-06-12 20:00:54,879 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 670.6ms TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:00:54,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-12 20:00:54,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 167. [2021-06-12 20:00:54,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1204819277108435) internal successors, (352), 166 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:54,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 352 transitions. [2021-06-12 20:00:54,881 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 352 transitions. Word has length 19 [2021-06-12 20:00:54,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:54,881 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 352 transitions. [2021-06-12 20:00:54,881 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) [2021-06-12 20:00:54,881 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 352 transitions. [2021-06-12 20:00:54,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:54,881 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:54,881 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:55,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3588,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:55,082 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:55,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:55,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1568442018, now seen corresponding path program 493 times [2021-06-12 20:00:55,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:55,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257677294] [2021-06-12 20:00:55,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:55,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:55,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257677294] [2021-06-12 20:00:55,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257677294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:55,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633466423] [2021-06-12 20:00:55,180 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 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 [2021-06-12 20:00:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:55,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:55,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:55,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633466423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:55,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:55,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:00:55,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975032147] [2021-06-12 20:00:55,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:00:55,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:55,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:00:55,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:55,414 INFO L87 Difference]: Start difference. First operand 167 states and 352 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) [2021-06-12 20:00:56,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:56,065 INFO L93 Difference]: Finished difference Result 238 states and 484 transitions. [2021-06-12 20:00:56,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:00:56,066 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 [2021-06-12 20:00:56,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:56,066 INFO L225 Difference]: With dead ends: 238 [2021-06-12 20:00:56,066 INFO L226 Difference]: Without dead ends: 238 [2021-06-12 20:00:56,066 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 677.9ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:00:56,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-12 20:00:56,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 166. [2021-06-12 20:00:56,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.121212121212121) internal successors, (350), 165 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:56,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 350 transitions. [2021-06-12 20:00:56,068 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 350 transitions. Word has length 19 [2021-06-12 20:00:56,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:56,068 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 350 transitions. [2021-06-12 20:00:56,068 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) [2021-06-12 20:00:56,068 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 350 transitions. [2021-06-12 20:00:56,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:56,068 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:56,069 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:56,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3593 [2021-06-12 20:00:56,269 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:56,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:56,269 INFO L82 PathProgramCache]: Analyzing trace with hash 85307080, now seen corresponding path program 494 times [2021-06-12 20:00:56,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:56,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300683390] [2021-06-12 20:00:56,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:56,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:56,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300683390] [2021-06-12 20:00:56,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300683390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:56,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813402200] [2021-06-12 20:00:56,364 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 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 [2021-06-12 20:00:56,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:56,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:56,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:00:56,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:56,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813402200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:56,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:56,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:00:56,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231573689] [2021-06-12 20:00:56,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:00:56,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:56,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:00:56,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:56,581 INFO L87 Difference]: Start difference. First operand 166 states and 350 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) [2021-06-12 20:00:57,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:57,201 INFO L93 Difference]: Finished difference Result 250 states and 509 transitions. [2021-06-12 20:00:57,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:00:57,202 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 [2021-06-12 20:00:57,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:57,202 INFO L225 Difference]: With dead ends: 250 [2021-06-12 20:00:57,202 INFO L226 Difference]: Without dead ends: 250 [2021-06-12 20:00:57,202 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 629.4ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:00:57,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-06-12 20:00:57,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 165. [2021-06-12 20:00:57,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.1219512195121952) internal successors, (348), 164 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:57,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 348 transitions. [2021-06-12 20:00:57,204 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 348 transitions. Word has length 19 [2021-06-12 20:00:57,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:57,204 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 348 transitions. [2021-06-12 20:00:57,204 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) [2021-06-12 20:00:57,204 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 348 transitions. [2021-06-12 20:00:57,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:57,204 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:57,204 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:57,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3598,495 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:57,405 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:57,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:57,405 INFO L82 PathProgramCache]: Analyzing trace with hash 930278532, now seen corresponding path program 495 times [2021-06-12 20:00:57,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:57,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519433693] [2021-06-12 20:00:57,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:57,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:57,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519433693] [2021-06-12 20:00:57,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519433693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:57,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379734610] [2021-06-12 20:00:57,488 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 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 [2021-06-12 20:00:57,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:00:57,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:57,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:00:57,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:57,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379734610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:57,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:57,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 20:00:57,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295904909] [2021-06-12 20:00:57,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:57,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:57,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:57,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:57,663 INFO L87 Difference]: Start difference. First operand 165 states and 348 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) [2021-06-12 20:00:57,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:57,798 INFO L93 Difference]: Finished difference Result 219 states and 444 transitions. [2021-06-12 20:00:57,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:00:57,798 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 [2021-06-12 20:00:57,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:57,799 INFO L225 Difference]: With dead ends: 219 [2021-06-12 20:00:57,799 INFO L226 Difference]: Without dead ends: 219 [2021-06-12 20:00:57,799 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:57,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-12 20:00:57,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 159. [2021-06-12 20:00:57,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.1012658227848102) internal successors, (332), 158 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:57,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 332 transitions. [2021-06-12 20:00:57,800 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 332 transitions. Word has length 19 [2021-06-12 20:00:57,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:57,800 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 332 transitions. [2021-06-12 20:00:57,800 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) [2021-06-12 20:00:57,801 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 332 transitions. [2021-06-12 20:00:57,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:00:57,801 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:57,801 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:58,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3603,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:58,001 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:58,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:58,001 INFO L82 PathProgramCache]: Analyzing trace with hash 313289047, now seen corresponding path program 496 times [2021-06-12 20:00:58,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:58,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223280140] [2021-06-12 20:00:58,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:58,281 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:58,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:58,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223280140] [2021-06-12 20:00:58,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223280140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:58,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364790774] [2021-06-12 20:00:58,281 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 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 [2021-06-12 20:00:58,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:58,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:58,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:00:58,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:58,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364790774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:58,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:58,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:00:58,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53399999] [2021-06-12 20:00:58,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:00:58,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:58,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:00:58,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:00:58,760 INFO L87 Difference]: Start difference. First operand 159 states and 332 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:59,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:59,322 INFO L93 Difference]: Finished difference Result 250 states and 493 transitions. [2021-06-12 20:00:59,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:59,322 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:00:59,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:59,323 INFO L225 Difference]: With dead ends: 250 [2021-06-12 20:00:59,323 INFO L226 Difference]: Without dead ends: 231 [2021-06-12 20:00:59,323 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 970.6ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:00:59,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-12 20:00:59,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2021-06-12 20:00:59,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.10062893081761) internal successors, (334), 159 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) [2021-06-12 20:00:59,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 334 transitions. [2021-06-12 20:00:59,324 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 334 transitions. Word has length 20 [2021-06-12 20:00:59,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:59,325 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 334 transitions. [2021-06-12 20:00:59,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:59,325 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 334 transitions. [2021-06-12 20:00:59,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:00:59,325 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:59,325 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:59,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3608 [2021-06-12 20:00:59,525 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:59,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:59,526 INFO L82 PathProgramCache]: Analyzing trace with hash -2044100551, now seen corresponding path program 497 times [2021-06-12 20:00:59,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:59,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558265838] [2021-06-12 20:00:59,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:59,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:59,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558265838] [2021-06-12 20:00:59,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558265838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:59,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457017949] [2021-06-12 20:00:59,742 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 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 [2021-06-12 20:00:59,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:00:59,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:59,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:00:59,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:00,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457017949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:00,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:00,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:01:00,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759000246] [2021-06-12 20:01:00,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:01:00,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:00,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:01:00,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:01:00,250 INFO L87 Difference]: Start difference. First operand 160 states and 334 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:01,606 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-06-12 20:01:01,921 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 74 [2021-06-12 20:01:01,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:01,974 INFO L93 Difference]: Finished difference Result 282 states and 567 transitions. [2021-06-12 20:01:01,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:01:01,975 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:01,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:01,975 INFO L225 Difference]: With dead ends: 282 [2021-06-12 20:01:01,975 INFO L226 Difference]: Without dead ends: 258 [2021-06-12 20:01:01,975 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1890.4ms TimeCoverageRelationStatistics Valid=261, Invalid=1545, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:01:01,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-06-12 20:01:01,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 164. [2021-06-12 20:01:01,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1165644171779143) internal successors, (345), 163 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:01,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 345 transitions. [2021-06-12 20:01:01,977 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 345 transitions. Word has length 20 [2021-06-12 20:01:01,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:01,977 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 345 transitions. [2021-06-12 20:01:01,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:01,977 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 345 transitions. [2021-06-12 20:01:01,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:01,977 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:01,977 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:02,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3620,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:02,178 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:02,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:02,178 INFO L82 PathProgramCache]: Analyzing trace with hash -983322461, now seen corresponding path program 498 times [2021-06-12 20:01:02,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:02,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288425337] [2021-06-12 20:01:02,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:02,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:02,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288425337] [2021-06-12 20:01:02,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288425337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:02,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169288996] [2021-06-12 20:01:02,381 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 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 [2021-06-12 20:01:02,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:01:02,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:02,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:01:02,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:02,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169288996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:02,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:02,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:01:02,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986139708] [2021-06-12 20:01:02,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:01:02,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:02,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:01:02,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:02,900 INFO L87 Difference]: Start difference. First operand 164 states and 345 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:03,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:03,776 INFO L93 Difference]: Finished difference Result 214 states and 421 transitions. [2021-06-12 20:01:03,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:01:03,776 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:03,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:03,777 INFO L225 Difference]: With dead ends: 214 [2021-06-12 20:01:03,777 INFO L226 Difference]: Without dead ends: 197 [2021-06-12 20:01:03,777 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1197.1ms TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:01:03,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-12 20:01:03,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 166. [2021-06-12 20:01:03,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.1151515151515152) internal successors, (349), 165 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:03,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 349 transitions. [2021-06-12 20:01:03,778 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 349 transitions. Word has length 20 [2021-06-12 20:01:03,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:03,778 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 349 transitions. [2021-06-12 20:01:03,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:03,779 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 349 transitions. [2021-06-12 20:01:03,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:03,779 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:03,779 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:03,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3632,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:03,981 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:03,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:03,981 INFO L82 PathProgramCache]: Analyzing trace with hash -685269503, now seen corresponding path program 499 times [2021-06-12 20:01:03,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:03,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006579622] [2021-06-12 20:01:03,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:04,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:04,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006579622] [2021-06-12 20:01:04,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006579622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:04,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891180336] [2021-06-12 20:01:04,191 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 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 [2021-06-12 20:01:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:04,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:01:04,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:04,684 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:04,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891180336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:04,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:04,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:01:04,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282635656] [2021-06-12 20:01:04,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:01:04,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:04,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:01:04,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:04,685 INFO L87 Difference]: Start difference. First operand 166 states and 349 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:05,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:05,766 INFO L93 Difference]: Finished difference Result 231 states and 458 transitions. [2021-06-12 20:01:05,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:01:05,767 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:05,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:05,767 INFO L225 Difference]: With dead ends: 231 [2021-06-12 20:01:05,767 INFO L226 Difference]: Without dead ends: 224 [2021-06-12 20:01:05,767 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1216.7ms TimeCoverageRelationStatistics Valid=149, Invalid=1573, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:01:05,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-12 20:01:05,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 167. [2021-06-12 20:01:05,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1204819277108435) internal successors, (352), 166 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:05,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 352 transitions. [2021-06-12 20:01:05,769 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 352 transitions. Word has length 20 [2021-06-12 20:01:05,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:05,769 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 352 transitions. [2021-06-12 20:01:05,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:05,769 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 352 transitions. [2021-06-12 20:01:05,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:05,769 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:05,769 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:05,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3644 [2021-06-12 20:01:05,970 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:05,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:05,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1956744419, now seen corresponding path program 500 times [2021-06-12 20:01:05,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:05,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69713391] [2021-06-12 20:01:05,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:06,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:06,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:06,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69713391] [2021-06-12 20:01:06,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69713391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:06,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022034498] [2021-06-12 20:01:06,211 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 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 [2021-06-12 20:01:06,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:06,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:06,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:01:06,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:06,533 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-12 20:01:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:06,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022034498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:06,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:06,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:01:06,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867014269] [2021-06-12 20:01:06,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:01:06,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:06,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:01:06,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:06,867 INFO L87 Difference]: Start difference. First operand 167 states and 352 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:07,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:07,841 INFO L93 Difference]: Finished difference Result 221 states and 433 transitions. [2021-06-12 20:01:07,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:01:07,841 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:07,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:07,841 INFO L225 Difference]: With dead ends: 221 [2021-06-12 20:01:07,841 INFO L226 Difference]: Without dead ends: 200 [2021-06-12 20:01:07,841 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1358.4ms TimeCoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:01:07,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-12 20:01:07,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 168. [2021-06-12 20:01:07,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.1137724550898205) internal successors, (353), 167 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:07,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 353 transitions. [2021-06-12 20:01:07,843 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 353 transitions. Word has length 20 [2021-06-12 20:01:07,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:07,843 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 353 transitions. [2021-06-12 20:01:07,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:07,843 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 353 transitions. [2021-06-12 20:01:07,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:07,843 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:07,843 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:08,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3659,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:08,044 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:08,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:08,044 INFO L82 PathProgramCache]: Analyzing trace with hash 379402689, now seen corresponding path program 501 times [2021-06-12 20:01:08,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:08,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164688607] [2021-06-12 20:01:08,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:08,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:08,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164688607] [2021-06-12 20:01:08,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164688607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:08,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233505533] [2021-06-12 20:01:08,294 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 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 [2021-06-12 20:01:08,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:01:08,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:08,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-12 20:01:08,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:08,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233505533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:08,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:08,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:01:08,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798974944] [2021-06-12 20:01:08,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:01:08,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:08,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:01:08,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:08,847 INFO L87 Difference]: Start difference. First operand 168 states and 353 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:09,612 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-06-12 20:01:09,967 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 67 [2021-06-12 20:01:10,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:10,157 INFO L93 Difference]: Finished difference Result 250 states and 485 transitions. [2021-06-12 20:01:10,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:01:10,157 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:10,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:10,157 INFO L225 Difference]: With dead ends: 250 [2021-06-12 20:01:10,157 INFO L226 Difference]: Without dead ends: 232 [2021-06-12 20:01:10,158 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1558.0ms TimeCoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:01:10,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-12 20:01:10,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 172. [2021-06-12 20:01:10,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.128654970760234) internal successors, (364), 171 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) [2021-06-12 20:01:10,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 364 transitions. [2021-06-12 20:01:10,160 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 364 transitions. Word has length 20 [2021-06-12 20:01:10,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:10,160 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 364 transitions. [2021-06-12 20:01:10,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:10,160 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 364 transitions. [2021-06-12 20:01:10,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:10,161 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:10,161 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:10,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3670 [2021-06-12 20:01:10,377 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:10,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:10,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1713994019, now seen corresponding path program 502 times [2021-06-12 20:01:10,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:10,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660475475] [2021-06-12 20:01:10,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:10,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:10,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:10,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660475475] [2021-06-12 20:01:10,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660475475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:10,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121638478] [2021-06-12 20:01:10,587 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 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 [2021-06-12 20:01:10,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:10,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:10,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:01:10,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:11,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121638478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:11,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:11,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:01:11,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947775001] [2021-06-12 20:01:11,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:01:11,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:11,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:01:11,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:11,145 INFO L87 Difference]: Start difference. First operand 172 states and 364 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:11,961 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-06-12 20:01:12,484 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-06-12 20:01:12,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:12,557 INFO L93 Difference]: Finished difference Result 250 states and 481 transitions. [2021-06-12 20:01:12,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:01:12,557 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:12,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:12,558 INFO L225 Difference]: With dead ends: 250 [2021-06-12 20:01:12,558 INFO L226 Difference]: Without dead ends: 227 [2021-06-12 20:01:12,558 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1639.2ms TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:01:12,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-12 20:01:12,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 171. [2021-06-12 20:01:12,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.1176470588235294) internal successors, (360), 170 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:12,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 360 transitions. [2021-06-12 20:01:12,559 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 360 transitions. Word has length 20 [2021-06-12 20:01:12,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:12,559 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 360 transitions. [2021-06-12 20:01:12,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:12,560 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 360 transitions. [2021-06-12 20:01:12,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:12,560 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:12,560 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:12,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3684,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:12,760 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:12,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:12,760 INFO L82 PathProgramCache]: Analyzing trace with hash 582187675, now seen corresponding path program 503 times [2021-06-12 20:01:12,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:12,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329220778] [2021-06-12 20:01:12,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:13,019 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:13,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:13,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329220778] [2021-06-12 20:01:13,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329220778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:13,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74351250] [2021-06-12 20:01:13,019 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 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 [2021-06-12 20:01:13,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:01:13,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:13,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:01:13,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:13,326 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 20:01:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:13,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74351250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:13,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:13,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:01:13,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453845290] [2021-06-12 20:01:13,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:01:13,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:13,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:01:13,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:13,553 INFO L87 Difference]: Start difference. First operand 171 states and 360 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:14,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:14,428 INFO L93 Difference]: Finished difference Result 220 states and 435 transitions. [2021-06-12 20:01:14,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:01:14,429 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:14,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:14,429 INFO L225 Difference]: With dead ends: 220 [2021-06-12 20:01:14,429 INFO L226 Difference]: Without dead ends: 205 [2021-06-12 20:01:14,429 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1194.5ms TimeCoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:01:14,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-12 20:01:14,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 175. [2021-06-12 20:01:14,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1149425287356323) internal successors, (368), 174 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:14,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 368 transitions. [2021-06-12 20:01:14,431 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 368 transitions. Word has length 20 [2021-06-12 20:01:14,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:14,431 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 368 transitions. [2021-06-12 20:01:14,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:14,431 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 368 transitions. [2021-06-12 20:01:14,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:14,431 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:14,431 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:14,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3696,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:14,632 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:14,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:14,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1070765699, now seen corresponding path program 504 times [2021-06-12 20:01:14,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:14,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957760761] [2021-06-12 20:01:14,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:14,907 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:14,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:14,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957760761] [2021-06-12 20:01:14,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957760761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:14,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285580969] [2021-06-12 20:01:14,907 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 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 [2021-06-12 20:01:14,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:01:14,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:14,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:01:14,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:15,211 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 20:01:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:15,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285580969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:15,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:15,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:01:15,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891052183] [2021-06-12 20:01:15,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:01:15,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:15,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:01:15,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:15,450 INFO L87 Difference]: Start difference. First operand 175 states and 368 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:16,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:16,364 INFO L93 Difference]: Finished difference Result 220 states and 436 transitions. [2021-06-12 20:01:16,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:01:16,364 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:16,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:16,365 INFO L225 Difference]: With dead ends: 220 [2021-06-12 20:01:16,365 INFO L226 Difference]: Without dead ends: 207 [2021-06-12 20:01:16,365 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1256.2ms TimeCoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:01:16,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-12 20:01:16,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 176. [2021-06-12 20:01:16,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.1142857142857143) internal successors, (370), 175 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) [2021-06-12 20:01:16,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 370 transitions. [2021-06-12 20:01:16,366 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 370 transitions. Word has length 20 [2021-06-12 20:01:16,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:16,366 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 370 transitions. [2021-06-12 20:01:16,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:16,367 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 370 transitions. [2021-06-12 20:01:16,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:16,367 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:16,367 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:16,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3708 [2021-06-12 20:01:16,567 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:16,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:16,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1646859867, now seen corresponding path program 505 times [2021-06-12 20:01:16,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:16,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075519727] [2021-06-12 20:01:16,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:16,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:16,867 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:16,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:16,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075519727] [2021-06-12 20:01:16,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075519727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:16,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134538814] [2021-06-12 20:01:16,867 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 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 [2021-06-12 20:01:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:16,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:01:16,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:17,174 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 20:01:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:17,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134538814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:17,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:17,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:01:17,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138767748] [2021-06-12 20:01:17,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:01:17,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:17,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:01:17,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:17,427 INFO L87 Difference]: Start difference. First operand 176 states and 370 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:18,503 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2021-06-12 20:01:18,716 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 76 [2021-06-12 20:01:18,905 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 79 [2021-06-12 20:01:19,180 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-06-12 20:01:19,481 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-06-12 20:01:19,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:19,717 INFO L93 Difference]: Finished difference Result 280 states and 546 transitions. [2021-06-12 20:01:19,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:01:19,718 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:19,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:19,718 INFO L225 Difference]: With dead ends: 280 [2021-06-12 20:01:19,718 INFO L226 Difference]: Without dead ends: 262 [2021-06-12 20:01:19,719 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 2547.2ms TimeCoverageRelationStatistics Valid=261, Invalid=2189, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:01:19,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-12 20:01:19,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 182. [2021-06-12 20:01:19,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.149171270718232) internal successors, (389), 181 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) [2021-06-12 20:01:19,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 389 transitions. [2021-06-12 20:01:19,721 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 389 transitions. Word has length 20 [2021-06-12 20:01:19,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:19,721 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 389 transitions. [2021-06-12 20:01:19,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:19,721 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 389 transitions. [2021-06-12 20:01:19,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:19,722 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:19,722 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:19,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3720,506 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:19,922 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:19,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:19,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1313516099, now seen corresponding path program 506 times [2021-06-12 20:01:19,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:19,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748690490] [2021-06-12 20:01:19,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:20,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:20,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748690490] [2021-06-12 20:01:20,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748690490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:20,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785008549] [2021-06-12 20:01:20,178 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 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 [2021-06-12 20:01:20,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:20,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:20,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:01:20,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:20,486 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 20:01:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:20,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785008549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:20,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:20,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:01:20,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401675994] [2021-06-12 20:01:20,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:01:20,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:20,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:01:20,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:20,741 INFO L87 Difference]: Start difference. First operand 182 states and 389 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:21,919 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2021-06-12 20:01:22,107 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2021-06-12 20:01:22,316 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2021-06-12 20:01:22,451 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-06-12 20:01:22,641 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2021-06-12 20:01:22,838 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-06-12 20:01:22,986 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-06-12 20:01:23,138 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2021-06-12 20:01:23,672 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 83 [2021-06-12 20:01:23,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:23,787 INFO L93 Difference]: Finished difference Result 307 states and 587 transitions. [2021-06-12 20:01:23,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:01:23,788 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:23,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:23,788 INFO L225 Difference]: With dead ends: 307 [2021-06-12 20:01:23,788 INFO L226 Difference]: Without dead ends: 288 [2021-06-12 20:01:23,788 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 3238.2ms TimeCoverageRelationStatistics Valid=342, Invalid=2628, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 20:01:23,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-06-12 20:01:23,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 182. [2021-06-12 20:01:23,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.154696132596685) internal successors, (390), 181 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) [2021-06-12 20:01:23,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 390 transitions. [2021-06-12 20:01:23,790 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 390 transitions. Word has length 20 [2021-06-12 20:01:23,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:23,790 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 390 transitions. [2021-06-12 20:01:23,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:23,790 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 390 transitions. [2021-06-12 20:01:23,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:23,791 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:23,791 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:23,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3732,507 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:23,991 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:23,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:23,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1741066659, now seen corresponding path program 507 times [2021-06-12 20:01:23,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:23,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758553296] [2021-06-12 20:01:23,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:23,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:24,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:24,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758553296] [2021-06-12 20:01:24,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758553296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:24,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337568821] [2021-06-12 20:01:24,241 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 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 [2021-06-12 20:01:24,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:01:24,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:24,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:01:24,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:24,583 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:01:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:24,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337568821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:24,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:24,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:01:24,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327794069] [2021-06-12 20:01:24,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:01:24,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:24,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:01:24,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:24,763 INFO L87 Difference]: Start difference. First operand 182 states and 390 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:25,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:25,843 INFO L93 Difference]: Finished difference Result 229 states and 462 transitions. [2021-06-12 20:01:25,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:01:25,843 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:25,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:25,843 INFO L225 Difference]: With dead ends: 229 [2021-06-12 20:01:25,843 INFO L226 Difference]: Without dead ends: 216 [2021-06-12 20:01:25,843 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1367.7ms TimeCoverageRelationStatistics Valid=177, Invalid=1545, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:01:25,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-12 20:01:25,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 184. [2021-06-12 20:01:25,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.1530054644808745) internal successors, (394), 183 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) [2021-06-12 20:01:25,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 394 transitions. [2021-06-12 20:01:25,845 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 394 transitions. Word has length 20 [2021-06-12 20:01:25,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:25,845 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 394 transitions. [2021-06-12 20:01:25,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:25,845 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 394 transitions. [2021-06-12 20:01:25,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:25,845 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:25,845 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:26,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3745,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:26,046 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:26,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:26,046 INFO L82 PathProgramCache]: Analyzing trace with hash 163724929, now seen corresponding path program 508 times [2021-06-12 20:01:26,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:26,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550018727] [2021-06-12 20:01:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:26,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:26,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550018727] [2021-06-12 20:01:26,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550018727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:26,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540819685] [2021-06-12 20:01:26,330 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 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 [2021-06-12 20:01:26,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:26,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:26,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:01:26,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:26,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540819685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:26,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:26,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:01:26,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573711001] [2021-06-12 20:01:26,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:01:26,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:26,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:01:26,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:26,810 INFO L87 Difference]: Start difference. First operand 184 states and 394 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:28,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:28,679 INFO L93 Difference]: Finished difference Result 256 states and 512 transitions. [2021-06-12 20:01:28,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:01:28,679 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:28,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:28,679 INFO L225 Difference]: With dead ends: 256 [2021-06-12 20:01:28,679 INFO L226 Difference]: Without dead ends: 242 [2021-06-12 20:01:28,679 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1982.0ms TimeCoverageRelationStatistics Valid=224, Invalid=2326, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:01:28,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-12 20:01:28,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 186. [2021-06-12 20:01:28,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.1675675675675676) internal successors, (401), 185 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) [2021-06-12 20:01:28,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 401 transitions. [2021-06-12 20:01:28,681 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 401 transitions. Word has length 20 [2021-06-12 20:01:28,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:28,681 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 401 transitions. [2021-06-12 20:01:28,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:28,681 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 401 transitions. [2021-06-12 20:01:28,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:28,681 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:28,682 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:28,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3757 [2021-06-12 20:01:28,882 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:28,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:28,882 INFO L82 PathProgramCache]: Analyzing trace with hash 670071195, now seen corresponding path program 509 times [2021-06-12 20:01:28,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:28,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250984615] [2021-06-12 20:01:28,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:29,195 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:29,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:29,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250984615] [2021-06-12 20:01:29,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250984615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:29,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101272032] [2021-06-12 20:01:29,195 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 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 [2021-06-12 20:01:29,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:01:29,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:29,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:01:29,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:29,595 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:01:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:29,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101272032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:29,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:29,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:01:29,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809425166] [2021-06-12 20:01:29,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:01:29,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:29,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:01:29,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:29,731 INFO L87 Difference]: Start difference. First operand 186 states and 401 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:31,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:31,180 INFO L93 Difference]: Finished difference Result 258 states and 517 transitions. [2021-06-12 20:01:31,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:01:31,180 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:31,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:31,181 INFO L225 Difference]: With dead ends: 258 [2021-06-12 20:01:31,181 INFO L226 Difference]: Without dead ends: 240 [2021-06-12 20:01:31,181 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1712.3ms TimeCoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:01:31,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-12 20:01:31,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 188. [2021-06-12 20:01:31,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.165775401069519) internal successors, (405), 187 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) [2021-06-12 20:01:31,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 405 transitions. [2021-06-12 20:01:31,183 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 405 transitions. Word has length 20 [2021-06-12 20:01:31,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:31,183 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 405 transitions. [2021-06-12 20:01:31,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:31,183 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 405 transitions. [2021-06-12 20:01:31,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:31,183 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:31,183 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:31,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3772,510 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:31,384 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:31,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:31,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1466806947, now seen corresponding path program 510 times [2021-06-12 20:01:31,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:31,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011865307] [2021-06-12 20:01:31,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:31,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:31,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011865307] [2021-06-12 20:01:31,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011865307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:31,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560581684] [2021-06-12 20:01:31,589 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 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 [2021-06-12 20:01:31,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:01:31,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:31,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:01:31,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:32,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560581684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:32,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:32,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:01:32,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823594176] [2021-06-12 20:01:32,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:01:32,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:32,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:01:32,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:32,052 INFO L87 Difference]: Start difference. First operand 188 states and 405 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:34,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:34,642 INFO L93 Difference]: Finished difference Result 312 states and 610 transitions. [2021-06-12 20:01:34,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 20:01:34,642 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:34,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:34,643 INFO L225 Difference]: With dead ends: 312 [2021-06-12 20:01:34,643 INFO L226 Difference]: Without dead ends: 280 [2021-06-12 20:01:34,643 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 2612.6ms TimeCoverageRelationStatistics Valid=437, Invalid=3985, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 20:01:34,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-12 20:01:34,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 198. [2021-06-12 20:01:34,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1624365482233503) internal successors, (426), 197 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 426 transitions. [2021-06-12 20:01:34,645 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 426 transitions. Word has length 20 [2021-06-12 20:01:34,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:34,645 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 426 transitions. [2021-06-12 20:01:34,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:34,645 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 426 transitions. [2021-06-12 20:01:34,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:34,645 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:34,645 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:34,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3784,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:34,846 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:34,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:34,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1836027257, now seen corresponding path program 511 times [2021-06-12 20:01:34,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:34,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282975118] [2021-06-12 20:01:34,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:35,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:35,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282975118] [2021-06-12 20:01:35,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282975118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:35,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274835247] [2021-06-12 20:01:35,112 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 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 [2021-06-12 20:01:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:35,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:01:35,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:35,624 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:35,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274835247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:35,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:35,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:01:35,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133896897] [2021-06-12 20:01:35,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:01:35,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:35,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:01:35,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:35,624 INFO L87 Difference]: Start difference. First operand 198 states and 426 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:36,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:36,392 INFO L93 Difference]: Finished difference Result 222 states and 462 transitions. [2021-06-12 20:01:36,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:01:36,392 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:36,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:36,392 INFO L225 Difference]: With dead ends: 222 [2021-06-12 20:01:36,392 INFO L226 Difference]: Without dead ends: 205 [2021-06-12 20:01:36,393 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1170.9ms TimeCoverageRelationStatistics Valid=131, Invalid=1201, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:01:36,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-12 20:01:36,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 199. [2021-06-12 20:01:36,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.1616161616161618) internal successors, (428), 198 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:36,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 428 transitions. [2021-06-12 20:01:36,394 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 428 transitions. Word has length 20 [2021-06-12 20:01:36,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:36,394 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 428 transitions. [2021-06-12 20:01:36,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:36,394 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 428 transitions. [2021-06-12 20:01:36,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:36,395 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:36,395 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:36,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3798 [2021-06-12 20:01:36,595 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:36,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:36,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2134080215, now seen corresponding path program 512 times [2021-06-12 20:01:36,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:36,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57291322] [2021-06-12 20:01:36,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:36,892 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:36,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:36,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57291322] [2021-06-12 20:01:36,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57291322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:36,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501736178] [2021-06-12 20:01:36,892 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 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 [2021-06-12 20:01:36,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:36,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:36,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:01:36,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:37,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501736178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:37,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:37,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:01:37,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096263022] [2021-06-12 20:01:37,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:01:37,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:37,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:01:37,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:37,439 INFO L87 Difference]: Start difference. First operand 199 states and 428 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:38,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:38,275 INFO L93 Difference]: Finished difference Result 221 states and 461 transitions. [2021-06-12 20:01:38,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:01:38,275 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:38,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:38,276 INFO L225 Difference]: With dead ends: 221 [2021-06-12 20:01:38,276 INFO L226 Difference]: Without dead ends: 206 [2021-06-12 20:01:38,276 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1260.4ms TimeCoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:01:38,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-06-12 20:01:38,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 200. [2021-06-12 20:01:38,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.1608040201005023) internal successors, (430), 199 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:38,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 430 transitions. [2021-06-12 20:01:38,278 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 430 transitions. Word has length 20 [2021-06-12 20:01:38,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:38,278 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 430 transitions. [2021-06-12 20:01:38,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:38,278 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 430 transitions. [2021-06-12 20:01:38,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:38,278 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:38,278 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:38,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3810,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:38,478 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:38,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:38,479 INFO L82 PathProgramCache]: Analyzing trace with hash 481126841, now seen corresponding path program 513 times [2021-06-12 20:01:38,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:38,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366811066] [2021-06-12 20:01:38,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:38,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:38,772 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:38,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:38,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366811066] [2021-06-12 20:01:38,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366811066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:38,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168854776] [2021-06-12 20:01:38,772 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 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 [2021-06-12 20:01:38,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:01:38,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:38,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:01:38,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:39,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168854776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:39,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:39,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:01:39,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879360727] [2021-06-12 20:01:39,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:01:39,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:39,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:01:39,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:39,339 INFO L87 Difference]: Start difference. First operand 200 states and 430 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:40,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:40,131 INFO L93 Difference]: Finished difference Result 221 states and 462 transitions. [2021-06-12 20:01:40,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:01:40,132 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:40,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:40,132 INFO L225 Difference]: With dead ends: 221 [2021-06-12 20:01:40,132 INFO L226 Difference]: Without dead ends: 208 [2021-06-12 20:01:40,132 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1218.3ms TimeCoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:01:40,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-12 20:01:40,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 201. [2021-06-12 20:01:40,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.16) internal successors, (432), 200 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:40,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 432 transitions. [2021-06-12 20:01:40,134 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 432 transitions. Word has length 20 [2021-06-12 20:01:40,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:40,134 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 432 transitions. [2021-06-12 20:01:40,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:40,134 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 432 transitions. [2021-06-12 20:01:40,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:40,134 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:40,134 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:40,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3822,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:40,334 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:40,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:40,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1096214889, now seen corresponding path program 514 times [2021-06-12 20:01:40,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:40,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531652559] [2021-06-12 20:01:40,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:40,638 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:40,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:40,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531652559] [2021-06-12 20:01:40,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531652559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:40,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340492565] [2021-06-12 20:01:40,638 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 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 [2021-06-12 20:01:40,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:40,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:40,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:01:40,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:41,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340492565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:41,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:41,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:01:41,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286003956] [2021-06-12 20:01:41,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:01:41,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:41,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:01:41,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:41,221 INFO L87 Difference]: Start difference. First operand 201 states and 432 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:42,018 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-06-12 20:01:42,358 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2021-06-12 20:01:42,597 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2021-06-12 20:01:42,944 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 79 [2021-06-12 20:01:43,253 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-12 20:01:43,397 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-12 20:01:43,686 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2021-06-12 20:01:43,981 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-06-12 20:01:44,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:44,027 INFO L93 Difference]: Finished difference Result 280 states and 569 transitions. [2021-06-12 20:01:44,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:01:44,027 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:44,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:44,027 INFO L225 Difference]: With dead ends: 280 [2021-06-12 20:01:44,027 INFO L226 Difference]: Without dead ends: 262 [2021-06-12 20:01:44,028 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 3149.3ms TimeCoverageRelationStatistics Valid=260, Invalid=1996, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:01:44,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-12 20:01:44,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 207. [2021-06-12 20:01:44,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.1893203883495147) internal successors, (451), 206 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:44,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 451 transitions. [2021-06-12 20:01:44,029 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 451 transitions. Word has length 20 [2021-06-12 20:01:44,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:44,030 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 451 transitions. [2021-06-12 20:01:44,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:44,030 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 451 transitions. [2021-06-12 20:01:44,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:44,030 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:44,030 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:44,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3834,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:44,230 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:44,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:44,230 INFO L82 PathProgramCache]: Analyzing trace with hash -256963049, now seen corresponding path program 515 times [2021-06-12 20:01:44,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:44,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069011830] [2021-06-12 20:01:44,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:44,493 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:44,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:44,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069011830] [2021-06-12 20:01:44,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069011830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:44,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015851599] [2021-06-12 20:01:44,493 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 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 [2021-06-12 20:01:44,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:01:44,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:44,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:01:44,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:44,797 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 20:01:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:45,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015851599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:45,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:45,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:01:45,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262299720] [2021-06-12 20:01:45,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:01:45,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:45,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:01:45,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:01:45,014 INFO L87 Difference]: Start difference. First operand 207 states and 451 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:45,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:45,469 INFO L93 Difference]: Finished difference Result 231 states and 488 transitions. [2021-06-12 20:01:45,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:01:45,470 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:45,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:45,470 INFO L225 Difference]: With dead ends: 231 [2021-06-12 20:01:45,470 INFO L226 Difference]: Without dead ends: 216 [2021-06-12 20:01:45,470 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 867.0ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:01:45,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-12 20:01:45,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 210. [2021-06-12 20:01:45,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.186602870813397) internal successors, (457), 209 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:45,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 457 transitions. [2021-06-12 20:01:45,472 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 457 transitions. Word has length 20 [2021-06-12 20:01:45,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:45,472 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 457 transitions. [2021-06-12 20:01:45,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:45,472 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 457 transitions. [2021-06-12 20:01:45,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:45,472 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:45,472 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:45,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3846,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:45,673 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:45,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:45,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1909916423, now seen corresponding path program 516 times [2021-06-12 20:01:45,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:45,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933422509] [2021-06-12 20:01:45,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:45,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:45,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933422509] [2021-06-12 20:01:45,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933422509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:45,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118185755] [2021-06-12 20:01:45,940 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 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 [2021-06-12 20:01:45,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:01:45,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:45,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:01:45,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:46,240 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 20:01:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:46,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118185755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:46,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:46,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:01:46,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366913705] [2021-06-12 20:01:46,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:01:46,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:46,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:01:46,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:01:46,471 INFO L87 Difference]: Start difference. First operand 210 states and 457 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:47,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:47,013 INFO L93 Difference]: Finished difference Result 231 states and 489 transitions. [2021-06-12 20:01:47,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:01:47,014 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:47,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:47,014 INFO L225 Difference]: With dead ends: 231 [2021-06-12 20:01:47,014 INFO L226 Difference]: Without dead ends: 218 [2021-06-12 20:01:47,014 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 899.2ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:01:47,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-12 20:01:47,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 211. [2021-06-12 20:01:47,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.1857142857142855) internal successors, (459), 210 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) [2021-06-12 20:01:47,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 459 transitions. [2021-06-12 20:01:47,016 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 459 transitions. Word has length 20 [2021-06-12 20:01:47,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:47,016 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 459 transitions. [2021-06-12 20:01:47,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:47,016 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 459 transitions. [2021-06-12 20:01:47,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:47,016 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:47,017 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:47,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3858 [2021-06-12 20:01:47,217 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:47,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:47,217 INFO L82 PathProgramCache]: Analyzing trace with hash 807709143, now seen corresponding path program 517 times [2021-06-12 20:01:47,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:47,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264069800] [2021-06-12 20:01:47,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:47,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:47,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264069800] [2021-06-12 20:01:47,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264069800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:47,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229898087] [2021-06-12 20:01:47,460 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 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 [2021-06-12 20:01:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:47,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:01:47,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:47,760 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 20:01:48,001 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:48,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229898087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:48,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:48,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:01:48,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865896697] [2021-06-12 20:01:48,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:01:48,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:48,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:01:48,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:01:48,001 INFO L87 Difference]: Start difference. First operand 211 states and 459 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:48,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:48,560 INFO L93 Difference]: Finished difference Result 243 states and 510 transitions. [2021-06-12 20:01:48,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:01:48,560 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:48,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:48,560 INFO L225 Difference]: With dead ends: 243 [2021-06-12 20:01:48,560 INFO L226 Difference]: Without dead ends: 232 [2021-06-12 20:01:48,560 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 926.7ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:01:48,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-12 20:01:48,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 212. [2021-06-12 20:01:48,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.184834123222749) internal successors, (461), 211 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:48,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 461 transitions. [2021-06-12 20:01:48,562 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 461 transitions. Word has length 20 [2021-06-12 20:01:48,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:48,562 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 461 transitions. [2021-06-12 20:01:48,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:48,562 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 461 transitions. [2021-06-12 20:01:48,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:48,563 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:48,563 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:48,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 518 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3870 [2021-06-12 20:01:48,763 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:48,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:48,763 INFO L82 PathProgramCache]: Analyzing trace with hash 2142300473, now seen corresponding path program 518 times [2021-06-12 20:01:48,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:48,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519088709] [2021-06-12 20:01:48,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:48,984 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:48,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:48,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519088709] [2021-06-12 20:01:48,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519088709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:48,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287273301] [2021-06-12 20:01:48,984 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 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 [2021-06-12 20:01:49,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:49,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:49,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:01:49,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:49,278 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 20:01:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:49,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287273301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:49,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:49,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:01:49,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896146632] [2021-06-12 20:01:49,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:01:49,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:49,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:01:49,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:01:49,525 INFO L87 Difference]: Start difference. First operand 212 states and 461 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:50,107 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-06-12 20:01:50,320 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2021-06-12 20:01:50,628 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2021-06-12 20:01:50,869 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-06-12 20:01:51,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:51,392 INFO L93 Difference]: Finished difference Result 341 states and 671 transitions. [2021-06-12 20:01:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:01:51,392 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:51,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:51,392 INFO L225 Difference]: With dead ends: 341 [2021-06-12 20:01:51,393 INFO L226 Difference]: Without dead ends: 308 [2021-06-12 20:01:51,393 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 2026.3ms TimeCoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:01:51,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-12 20:01:51,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 215. [2021-06-12 20:01:51,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2009345794392523) internal successors, (471), 214 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) [2021-06-12 20:01:51,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 471 transitions. [2021-06-12 20:01:51,395 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 471 transitions. Word has length 20 [2021-06-12 20:01:51,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:51,395 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 471 transitions. [2021-06-12 20:01:51,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:51,396 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 471 transitions. [2021-06-12 20:01:51,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:51,396 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:51,396 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:51,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3882,519 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:51,606 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:51,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:51,606 INFO L82 PathProgramCache]: Analyzing trace with hash 901915935, now seen corresponding path program 519 times [2021-06-12 20:01:51,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:51,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640943446] [2021-06-12 20:01:51,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:51,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:51,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:51,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640943446] [2021-06-12 20:01:51,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640943446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:51,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185272234] [2021-06-12 20:01:51,839 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 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 [2021-06-12 20:01:51,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:01:51,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:51,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:01:51,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:52,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185272234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:52,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:52,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:01:52,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352677284] [2021-06-12 20:01:52,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:01:52,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:52,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:01:52,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:01:52,355 INFO L87 Difference]: Start difference. First operand 215 states and 471 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:52,891 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-06-12 20:01:53,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:53,134 INFO L93 Difference]: Finished difference Result 248 states and 523 transitions. [2021-06-12 20:01:53,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:01:53,134 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:53,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:53,135 INFO L225 Difference]: With dead ends: 248 [2021-06-12 20:01:53,135 INFO L226 Difference]: Without dead ends: 241 [2021-06-12 20:01:53,135 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1101.6ms TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:01:53,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-12 20:01:53,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 217. [2021-06-12 20:01:53,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.2037037037037037) internal successors, (476), 216 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:53,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 476 transitions. [2021-06-12 20:01:53,137 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 476 transitions. Word has length 20 [2021-06-12 20:01:53,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:53,137 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 476 transitions. [2021-06-12 20:01:53,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:53,137 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 476 transitions. [2021-06-12 20:01:53,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:53,137 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:53,137 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:53,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3895,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:53,338 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:53,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:53,338 INFO L82 PathProgramCache]: Analyzing trace with hash -675425795, now seen corresponding path program 520 times [2021-06-12 20:01:53,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:53,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516507525] [2021-06-12 20:01:53,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:53,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:53,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:53,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516507525] [2021-06-12 20:01:53,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516507525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:53,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773649521] [2021-06-12 20:01:53,570 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 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 [2021-06-12 20:01:53,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:53,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:53,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:01:53,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:53,896 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:01:54,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:54,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773649521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:54,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:54,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:01:54,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516136127] [2021-06-12 20:01:54,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:01:54,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:54,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:01:54,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:01:54,078 INFO L87 Difference]: Start difference. First operand 217 states and 476 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:54,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:54,792 INFO L93 Difference]: Finished difference Result 254 states and 532 transitions. [2021-06-12 20:01:54,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:01:54,793 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:54,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:54,793 INFO L225 Difference]: With dead ends: 254 [2021-06-12 20:01:54,793 INFO L226 Difference]: Without dead ends: 237 [2021-06-12 20:01:54,793 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1022.1ms TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:01:54,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-12 20:01:54,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 218. [2021-06-12 20:01:54,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.19815668202765) internal successors, (477), 217 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:54,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 477 transitions. [2021-06-12 20:01:54,795 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 477 transitions. Word has length 20 [2021-06-12 20:01:54,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:54,795 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 477 transitions. [2021-06-12 20:01:54,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:54,795 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 477 transitions. [2021-06-12 20:01:54,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:54,795 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:54,796 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:54,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3909,521 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:54,996 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:54,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:54,996 INFO L82 PathProgramCache]: Analyzing trace with hash 659165535, now seen corresponding path program 521 times [2021-06-12 20:01:54,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:54,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77929711] [2021-06-12 20:01:54,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:55,192 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:55,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:55,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77929711] [2021-06-12 20:01:55,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77929711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:55,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394691201] [2021-06-12 20:01:55,192 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 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 [2021-06-12 20:01:55,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:01:55,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:55,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:01:55,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:55,510 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:01:55,674 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:55,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394691201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:55,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:55,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:01:55,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835717324] [2021-06-12 20:01:55,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:01:55,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:55,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:01:55,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:01:55,675 INFO L87 Difference]: Start difference. First operand 218 states and 477 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:57,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:57,188 INFO L93 Difference]: Finished difference Result 308 states and 630 transitions. [2021-06-12 20:01:57,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:01:57,188 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:57,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:57,188 INFO L225 Difference]: With dead ends: 308 [2021-06-12 20:01:57,188 INFO L226 Difference]: Without dead ends: 276 [2021-06-12 20:01:57,188 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1697.3ms TimeCoverageRelationStatistics Valid=278, Invalid=1702, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:01:57,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-06-12 20:01:57,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 220. [2021-06-12 20:01:57,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.2146118721461185) internal successors, (485), 219 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) [2021-06-12 20:01:57,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 485 transitions. [2021-06-12 20:01:57,190 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 485 transitions. Word has length 20 [2021-06-12 20:01:57,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:57,190 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 485 transitions. [2021-06-12 20:01:57,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:57,191 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 485 transitions. [2021-06-12 20:01:57,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:57,191 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:57,191 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:57,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3921,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:57,391 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:57,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:57,391 INFO L82 PathProgramCache]: Analyzing trace with hash -169079529, now seen corresponding path program 522 times [2021-06-12 20:01:57,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:57,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207725627] [2021-06-12 20:01:57,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:57,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:57,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:57,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207725627] [2021-06-12 20:01:57,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207725627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:57,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957333811] [2021-06-12 20:01:57,584 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 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 [2021-06-12 20:01:57,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:01:57,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:57,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:01:57,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:57,931 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:01:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:58,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957333811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:58,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:58,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:01:58,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273006422] [2021-06-12 20:01:58,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:01:58,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:58,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:01:58,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:01:58,057 INFO L87 Difference]: Start difference. First operand 220 states and 485 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:58,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:58,912 INFO L93 Difference]: Finished difference Result 273 states and 580 transitions. [2021-06-12 20:01:58,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:01:58,913 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:01:58,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:58,913 INFO L225 Difference]: With dead ends: 273 [2021-06-12 20:01:58,913 INFO L226 Difference]: Without dead ends: 255 [2021-06-12 20:01:58,913 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1093.1ms TimeCoverageRelationStatistics Valid=177, Invalid=1305, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:01:58,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-12 20:01:58,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 220. [2021-06-12 20:01:58,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.2146118721461185) internal successors, (485), 219 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) [2021-06-12 20:01:58,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 485 transitions. [2021-06-12 20:01:58,915 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 485 transitions. Word has length 20 [2021-06-12 20:01:58,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:58,915 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 485 transitions. [2021-06-12 20:01:58,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:58,915 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 485 transitions. [2021-06-12 20:01:58,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:01:58,915 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:58,915 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:59,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3933,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:59,116 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:59,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:59,116 INFO L82 PathProgramCache]: Analyzing trace with hash -212189635, now seen corresponding path program 523 times [2021-06-12 20:01:59,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:59,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156053944] [2021-06-12 20:01:59,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:59,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:59,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156053944] [2021-06-12 20:01:59,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156053944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:59,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002104750] [2021-06-12 20:01:59,307 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 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 [2021-06-12 20:01:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:59,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:01:59,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:59,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002104750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:59,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:59,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:01:59,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166316998] [2021-06-12 20:01:59,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:01:59,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:59,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:01:59,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:01:59,695 INFO L87 Difference]: Start difference. First operand 220 states and 485 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:00,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:00,447 INFO L93 Difference]: Finished difference Result 284 states and 592 transitions. [2021-06-12 20:02:00,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:02:00,447 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:00,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:00,447 INFO L225 Difference]: With dead ends: 284 [2021-06-12 20:02:00,447 INFO L226 Difference]: Without dead ends: 268 [2021-06-12 20:02:00,447 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 921.6ms TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:02:00,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-12 20:02:00,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 225. [2021-06-12 20:02:00,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.2276785714285716) internal successors, (499), 224 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) [2021-06-12 20:02:00,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 499 transitions. [2021-06-12 20:02:00,449 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 499 transitions. Word has length 20 [2021-06-12 20:02:00,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:00,449 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 499 transitions. [2021-06-12 20:02:00,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:00,449 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 499 transitions. [2021-06-12 20:02:00,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:00,450 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:00,450 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:00,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3945,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:00,650 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:00,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:00,650 INFO L82 PathProgramCache]: Analyzing trace with hash -2125594183, now seen corresponding path program 524 times [2021-06-12 20:02:00,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:00,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769145345] [2021-06-12 20:02:00,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:00,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:00,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:00,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769145345] [2021-06-12 20:02:00,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769145345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:00,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164577016] [2021-06-12 20:02:00,889 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 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 [2021-06-12 20:02:00,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:00,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:00,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:02:00,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:01,211 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:02:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:01,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164577016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:01,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:01,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:02:01,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212361377] [2021-06-12 20:02:01,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:02:01,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:01,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:02:01,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:01,386 INFO L87 Difference]: Start difference. First operand 225 states and 499 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:01,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:01,759 INFO L93 Difference]: Finished difference Result 247 states and 533 transitions. [2021-06-12 20:02:01,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:02:01,759 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:01,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:01,759 INFO L225 Difference]: With dead ends: 247 [2021-06-12 20:02:01,759 INFO L226 Difference]: Without dead ends: 234 [2021-06-12 20:02:01,760 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 768.4ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:02:01,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-12 20:02:01,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 228. [2021-06-12 20:02:01,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.2246696035242293) internal successors, (505), 227 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) [2021-06-12 20:02:01,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 505 transitions. [2021-06-12 20:02:01,761 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 505 transitions. Word has length 20 [2021-06-12 20:02:01,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:01,761 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 505 transitions. [2021-06-12 20:02:01,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:01,762 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 505 transitions. [2021-06-12 20:02:01,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:01,762 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:01,762 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:01,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3957,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:01,962 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:01,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:01,962 INFO L82 PathProgramCache]: Analyzing trace with hash 592031383, now seen corresponding path program 525 times [2021-06-12 20:02:01,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:01,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204088988] [2021-06-12 20:02:01,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:02,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:02,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204088988] [2021-06-12 20:02:02,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204088988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:02,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010031797] [2021-06-12 20:02:02,207 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 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 [2021-06-12 20:02:02,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:02:02,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:02,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:02:02,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:02,538 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:02:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:02,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010031797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:02,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:02,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:02:02,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167642326] [2021-06-12 20:02:02,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:02:02,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:02,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:02:02,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:02,721 INFO L87 Difference]: Start difference. First operand 228 states and 505 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:03,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:03,521 INFO L93 Difference]: Finished difference Result 279 states and 585 transitions. [2021-06-12 20:02:03,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:02:03,521 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:03,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:03,521 INFO L225 Difference]: With dead ends: 279 [2021-06-12 20:02:03,521 INFO L226 Difference]: Without dead ends: 254 [2021-06-12 20:02:03,521 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1094.6ms TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:02:03,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-12 20:02:03,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 228. [2021-06-12 20:02:03,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.2246696035242293) internal successors, (505), 227 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) [2021-06-12 20:02:03,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 505 transitions. [2021-06-12 20:02:03,523 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 505 transitions. Word has length 20 [2021-06-12 20:02:03,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:03,523 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 505 transitions. [2021-06-12 20:02:03,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:03,523 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 505 transitions. [2021-06-12 20:02:03,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:03,524 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:03,524 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:03,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3969 [2021-06-12 20:02:03,724 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:03,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:03,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1098377649, now seen corresponding path program 526 times [2021-06-12 20:02:03,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:03,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352073078] [2021-06-12 20:02:03,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:03,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:03,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:03,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352073078] [2021-06-12 20:02:03,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352073078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:03,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067956406] [2021-06-12 20:02:03,987 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 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 [2021-06-12 20:02:04,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:04,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:04,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:02:04,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:04,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067956406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:04,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:04,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:02:04,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700908778] [2021-06-12 20:02:04,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:02:04,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:04,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:02:04,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:04,414 INFO L87 Difference]: Start difference. First operand 228 states and 505 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:05,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:05,637 INFO L93 Difference]: Finished difference Result 276 states and 586 transitions. [2021-06-12 20:02:05,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:02:05,637 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:05,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:05,638 INFO L225 Difference]: With dead ends: 276 [2021-06-12 20:02:05,638 INFO L226 Difference]: Without dead ends: 258 [2021-06-12 20:02:05,638 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1467.2ms TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:02:05,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-06-12 20:02:05,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 232. [2021-06-12 20:02:05,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.220779220779221) internal successors, (513), 231 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:05,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 513 transitions. [2021-06-12 20:02:05,640 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 513 transitions. Word has length 20 [2021-06-12 20:02:05,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:05,640 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 513 transitions. [2021-06-12 20:02:05,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:05,640 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 513 transitions. [2021-06-12 20:02:05,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:05,640 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:05,640 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:05,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:05,841 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:05,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:05,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1861998317, now seen corresponding path program 527 times [2021-06-12 20:02:05,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:05,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071159322] [2021-06-12 20:02:05,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:05,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:06,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:06,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071159322] [2021-06-12 20:02:06,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071159322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:06,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970812197] [2021-06-12 20:02:06,022 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 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 [2021-06-12 20:02:06,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:02:06,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:06,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:02:06,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:06,370 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:02:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:06,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970812197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:06,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:06,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:02:06,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179352701] [2021-06-12 20:02:06,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:02:06,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:06,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:02:06,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:06,490 INFO L87 Difference]: Start difference. First operand 232 states and 513 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:07,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:07,073 INFO L93 Difference]: Finished difference Result 285 states and 598 transitions. [2021-06-12 20:02:07,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:02:07,073 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:07,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:07,074 INFO L225 Difference]: With dead ends: 285 [2021-06-12 20:02:07,074 INFO L226 Difference]: Without dead ends: 259 [2021-06-12 20:02:07,074 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 835.2ms TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:02:07,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-06-12 20:02:07,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2021-06-12 20:02:07,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.217948717948718) internal successors, (519), 234 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) [2021-06-12 20:02:07,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 519 transitions. [2021-06-12 20:02:07,076 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 519 transitions. Word has length 20 [2021-06-12 20:02:07,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:07,076 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 519 transitions. [2021-06-12 20:02:07,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:07,076 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 519 transitions. [2021-06-12 20:02:07,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:07,076 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:07,076 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:07,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3996 [2021-06-12 20:02:07,277 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:07,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:07,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1895113401, now seen corresponding path program 528 times [2021-06-12 20:02:07,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:07,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395634035] [2021-06-12 20:02:07,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:07,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:07,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395634035] [2021-06-12 20:02:07,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395634035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:07,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634617014] [2021-06-12 20:02:07,481 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 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 [2021-06-12 20:02:07,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:02:07,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:07,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:02:07,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:07,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634617014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:07,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:07,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:02:07,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177884835] [2021-06-12 20:02:07,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:02:07,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:07,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:02:07,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:07,916 INFO L87 Difference]: Start difference. First operand 235 states and 519 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:08,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:08,703 INFO L93 Difference]: Finished difference Result 312 states and 656 transitions. [2021-06-12 20:02:08,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:02:08,703 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:08,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:08,703 INFO L225 Difference]: With dead ends: 312 [2021-06-12 20:02:08,703 INFO L226 Difference]: Without dead ends: 293 [2021-06-12 20:02:08,703 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1009.4ms TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:02:08,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-06-12 20:02:08,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 236. [2021-06-12 20:02:08,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.2212765957446807) internal successors, (522), 235 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) [2021-06-12 20:02:08,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 522 transitions. [2021-06-12 20:02:08,706 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 522 transitions. Word has length 20 [2021-06-12 20:02:08,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:08,706 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 522 transitions. [2021-06-12 20:02:08,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:08,706 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 522 transitions. [2021-06-12 20:02:08,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:08,706 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:08,706 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:08,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4009,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:08,907 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:08,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:08,907 INFO L82 PathProgramCache]: Analyzing trace with hash -384757289, now seen corresponding path program 529 times [2021-06-12 20:02:08,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:08,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96807844] [2021-06-12 20:02:08,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:09,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:09,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96807844] [2021-06-12 20:02:09,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96807844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:09,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552740284] [2021-06-12 20:02:09,166 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 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 [2021-06-12 20:02:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:09,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:02:09,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:09,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552740284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:09,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:09,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:02:09,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244781551] [2021-06-12 20:02:09,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:02:09,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:09,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:02:09,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:09,594 INFO L87 Difference]: Start difference. First operand 236 states and 522 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:10,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:10,428 INFO L93 Difference]: Finished difference Result 282 states and 600 transitions. [2021-06-12 20:02:10,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:02:10,428 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:10,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:10,429 INFO L225 Difference]: With dead ends: 282 [2021-06-12 20:02:10,429 INFO L226 Difference]: Without dead ends: 268 [2021-06-12 20:02:10,429 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1090.2ms TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:02:10,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-12 20:02:10,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 238. [2021-06-12 20:02:10,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.219409282700422) internal successors, (526), 237 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:10,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 526 transitions. [2021-06-12 20:02:10,431 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 526 transitions. Word has length 20 [2021-06-12 20:02:10,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:10,431 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 526 transitions. [2021-06-12 20:02:10,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:10,431 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 526 transitions. [2021-06-12 20:02:10,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:10,431 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:10,431 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:10,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4021,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:10,632 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:10,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:10,632 INFO L82 PathProgramCache]: Analyzing trace with hash 411978463, now seen corresponding path program 530 times [2021-06-12 20:02:10,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:10,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394308483] [2021-06-12 20:02:10,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:10,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:10,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394308483] [2021-06-12 20:02:10,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394308483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:10,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932714484] [2021-06-12 20:02:10,817 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 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 [2021-06-12 20:02:10,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:10,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:10,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:02:10,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:11,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:11,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932714484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:11,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:11,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:02:11,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225367403] [2021-06-12 20:02:11,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:02:11,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:11,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:02:11,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:11,257 INFO L87 Difference]: Start difference. First operand 238 states and 526 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:11,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:11,896 INFO L93 Difference]: Finished difference Result 304 states and 642 transitions. [2021-06-12 20:02:11,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:02:11,896 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:11,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:11,896 INFO L225 Difference]: With dead ends: 304 [2021-06-12 20:02:11,896 INFO L226 Difference]: Without dead ends: 285 [2021-06-12 20:02:11,896 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 806.1ms TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:02:11,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-06-12 20:02:11,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 238. [2021-06-12 20:02:11,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.219409282700422) internal successors, (526), 237 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:11,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 526 transitions. [2021-06-12 20:02:11,898 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 526 transitions. Word has length 20 [2021-06-12 20:02:11,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:11,898 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 526 transitions. [2021-06-12 20:02:11,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:11,899 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 526 transitions. [2021-06-12 20:02:11,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:11,899 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:11,899 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:12,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4036,531 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:12,099 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:12,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:12,099 INFO L82 PathProgramCache]: Analyzing trace with hash 918324729, now seen corresponding path program 531 times [2021-06-12 20:02:12,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:12,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024361415] [2021-06-12 20:02:12,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:12,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:12,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:12,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024361415] [2021-06-12 20:02:12,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024361415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:12,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396890316] [2021-06-12 20:02:12,332 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 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 [2021-06-12 20:02:12,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:02:12,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:12,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-12 20:02:12,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:12,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396890316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:12,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:12,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:02:12,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709769621] [2021-06-12 20:02:12,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:02:12,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:12,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:02:12,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:12,800 INFO L87 Difference]: Start difference. First operand 238 states and 526 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:13,447 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-06-12 20:02:13,577 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-06-12 20:02:13,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:13,710 INFO L93 Difference]: Finished difference Result 322 states and 659 transitions. [2021-06-12 20:02:13,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:02:13,710 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:13,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:13,711 INFO L225 Difference]: With dead ends: 322 [2021-06-12 20:02:13,711 INFO L226 Difference]: Without dead ends: 297 [2021-06-12 20:02:13,711 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1204.6ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:02:13,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-12 20:02:13,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 239. [2021-06-12 20:02:13,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.2184873949579833) internal successors, (528), 238 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) [2021-06-12 20:02:13,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 528 transitions. [2021-06-12 20:02:13,713 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 528 transitions. Word has length 20 [2021-06-12 20:02:13,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:13,713 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 528 transitions. [2021-06-12 20:02:13,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:13,713 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 528 transitions. [2021-06-12 20:02:13,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:13,713 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:13,713 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:13,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4048,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:13,914 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:13,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:13,914 INFO L82 PathProgramCache]: Analyzing trace with hash -958444701, now seen corresponding path program 532 times [2021-06-12 20:02:13,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:13,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922997065] [2021-06-12 20:02:13,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:14,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:14,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922997065] [2021-06-12 20:02:14,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922997065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:14,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957534102] [2021-06-12 20:02:14,097 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 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 [2021-06-12 20:02:14,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:14,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:14,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:02:14,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:14,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957534102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:14,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:14,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:02:14,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849321133] [2021-06-12 20:02:14,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:02:14,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:14,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:02:14,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:02:14,611 INFO L87 Difference]: Start difference. First operand 239 states and 528 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:15,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:15,568 INFO L93 Difference]: Finished difference Result 268 states and 583 transitions. [2021-06-12 20:02:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:02:15,568 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:15,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:15,569 INFO L225 Difference]: With dead ends: 268 [2021-06-12 20:02:15,569 INFO L226 Difference]: Without dead ends: 251 [2021-06-12 20:02:15,569 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1198.5ms TimeCoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:02:15,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-12 20:02:15,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 240. [2021-06-12 20:02:15,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.217573221757322) internal successors, (530), 239 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) [2021-06-12 20:02:15,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 530 transitions. [2021-06-12 20:02:15,571 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 530 transitions. Word has length 20 [2021-06-12 20:02:15,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:15,571 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 530 transitions. [2021-06-12 20:02:15,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:15,571 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 530 transitions. [2021-06-12 20:02:15,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:15,571 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:15,571 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:15,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4061 [2021-06-12 20:02:15,772 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:15,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:15,772 INFO L82 PathProgramCache]: Analyzing trace with hash -660391743, now seen corresponding path program 533 times [2021-06-12 20:02:15,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:15,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216788103] [2021-06-12 20:02:15,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:16,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:16,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216788103] [2021-06-12 20:02:16,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216788103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:16,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635792888] [2021-06-12 20:02:16,039 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 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 [2021-06-12 20:02:16,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:02:16,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:16,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:02:16,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:16,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635792888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:16,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:16,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:02:16,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806932092] [2021-06-12 20:02:16,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:02:16,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:16,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:02:16,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:02:16,595 INFO L87 Difference]: Start difference. First operand 240 states and 530 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:17,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:17,205 INFO L93 Difference]: Finished difference Result 259 states and 558 transitions. [2021-06-12 20:02:17,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:02:17,205 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:17,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:17,205 INFO L225 Difference]: With dead ends: 259 [2021-06-12 20:02:17,205 INFO L226 Difference]: Without dead ends: 244 [2021-06-12 20:02:17,205 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1060.7ms TimeCoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:02:17,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-12 20:02:17,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 241. [2021-06-12 20:02:17,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.216666666666667) internal successors, (532), 240 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:17,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 532 transitions. [2021-06-12 20:02:17,207 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 532 transitions. Word has length 20 [2021-06-12 20:02:17,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:17,207 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 532 transitions. [2021-06-12 20:02:17,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:17,207 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 532 transitions. [2021-06-12 20:02:17,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:17,208 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:17,208 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:17,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4073,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:17,408 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:17,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:17,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1981622179, now seen corresponding path program 534 times [2021-06-12 20:02:17,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:17,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768276926] [2021-06-12 20:02:17,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:17,698 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:17,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:17,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768276926] [2021-06-12 20:02:17,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768276926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:17,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301509169] [2021-06-12 20:02:17,699 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 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 [2021-06-12 20:02:17,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:02:17,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:17,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:02:17,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:18,367 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:18,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301509169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:18,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:18,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:02:18,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116960654] [2021-06-12 20:02:18,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:02:18,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:18,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:02:18,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:02:18,368 INFO L87 Difference]: Start difference. First operand 241 states and 532 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:19,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:19,139 INFO L93 Difference]: Finished difference Result 258 states and 557 transitions. [2021-06-12 20:02:19,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:02:19,139 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:19,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:19,140 INFO L225 Difference]: With dead ends: 258 [2021-06-12 20:02:19,140 INFO L226 Difference]: Without dead ends: 245 [2021-06-12 20:02:19,140 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1317.4ms TimeCoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:02:19,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-12 20:02:19,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2021-06-12 20:02:19,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.215767634854772) internal successors, (534), 241 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:19,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 534 transitions. [2021-06-12 20:02:19,142 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 534 transitions. Word has length 20 [2021-06-12 20:02:19,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:19,142 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 534 transitions. [2021-06-12 20:02:19,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:19,142 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 534 transitions. [2021-06-12 20:02:19,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:19,142 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:19,142 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:19,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4085 [2021-06-12 20:02:19,343 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:19,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:19,343 INFO L82 PathProgramCache]: Analyzing trace with hash 404280449, now seen corresponding path program 535 times [2021-06-12 20:02:19,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:19,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704647362] [2021-06-12 20:02:19,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:19,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:19,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704647362] [2021-06-12 20:02:19,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704647362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:19,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993309525] [2021-06-12 20:02:19,653 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 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 [2021-06-12 20:02:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:19,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:02:19,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:20,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993309525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:20,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:20,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:02:20,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809345527] [2021-06-12 20:02:20,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:02:20,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:20,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:02:20,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:02:20,182 INFO L87 Difference]: Start difference. First operand 242 states and 534 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:21,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:21,709 INFO L93 Difference]: Finished difference Result 283 states and 603 transitions. [2021-06-12 20:02:21,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:02:21,709 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:21,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:21,710 INFO L225 Difference]: With dead ends: 283 [2021-06-12 20:02:21,710 INFO L226 Difference]: Without dead ends: 269 [2021-06-12 20:02:21,710 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1794.1ms TimeCoverageRelationStatistics Valid=156, Invalid=1566, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:02:21,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-06-12 20:02:21,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 241. [2021-06-12 20:02:21,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.216666666666667) internal successors, (532), 240 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:21,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 532 transitions. [2021-06-12 20:02:21,712 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 532 transitions. Word has length 20 [2021-06-12 20:02:21,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:21,712 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 532 transitions. [2021-06-12 20:02:21,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:21,712 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 532 transitions. [2021-06-12 20:02:21,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:21,712 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:21,712 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:21,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4097 [2021-06-12 20:02:21,913 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:21,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:21,913 INFO L82 PathProgramCache]: Analyzing trace with hash 607065435, now seen corresponding path program 536 times [2021-06-12 20:02:21,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:21,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620093768] [2021-06-12 20:02:21,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:21,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:22,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:22,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620093768] [2021-06-12 20:02:22,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620093768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:22,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687815852] [2021-06-12 20:02:22,101 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 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 [2021-06-12 20:02:22,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:22,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:22,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:02:22,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:22,430 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 20:02:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:22,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687815852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:22,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:22,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:02:22,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532592321] [2021-06-12 20:02:22,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:02:22,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:22,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:02:22,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:02:22,648 INFO L87 Difference]: Start difference. First operand 241 states and 532 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:23,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:23,173 INFO L93 Difference]: Finished difference Result 260 states and 560 transitions. [2021-06-12 20:02:23,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:02:23,174 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:23,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:23,174 INFO L225 Difference]: With dead ends: 260 [2021-06-12 20:02:23,174 INFO L226 Difference]: Without dead ends: 245 [2021-06-12 20:02:23,174 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 930.4ms TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:02:23,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-12 20:02:23,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2021-06-12 20:02:23,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.215767634854772) internal successors, (534), 241 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:23,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 534 transitions. [2021-06-12 20:02:23,176 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 534 transitions. Word has length 20 [2021-06-12 20:02:23,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:23,176 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 534 transitions. [2021-06-12 20:02:23,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:23,176 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 534 transitions. [2021-06-12 20:02:23,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:23,177 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:23,177 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:23,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4112 [2021-06-12 20:02:23,377 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:23,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:23,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1045887939, now seen corresponding path program 537 times [2021-06-12 20:02:23,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:23,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947203151] [2021-06-12 20:02:23,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:23,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:23,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:23,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947203151] [2021-06-12 20:02:23,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947203151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:23,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99376927] [2021-06-12 20:02:23,573 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 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 [2021-06-12 20:02:23,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:02:23,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:23,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:02:23,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:24,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99376927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:24,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:24,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:02:24,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408137032] [2021-06-12 20:02:24,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:02:24,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:24,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:02:24,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:02:24,058 INFO L87 Difference]: Start difference. First operand 242 states and 534 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:25,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:25,412 INFO L93 Difference]: Finished difference Result 297 states and 622 transitions. [2021-06-12 20:02:25,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:02:25,413 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:25,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:25,413 INFO L225 Difference]: With dead ends: 297 [2021-06-12 20:02:25,413 INFO L226 Difference]: Without dead ends: 290 [2021-06-12 20:02:25,413 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1527.4ms TimeCoverageRelationStatistics Valid=161, Invalid=1479, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:02:25,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-06-12 20:02:25,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 243. [2021-06-12 20:02:25,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.21900826446281) internal successors, (537), 242 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) [2021-06-12 20:02:25,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 537 transitions. [2021-06-12 20:02:25,415 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 537 transitions. Word has length 20 [2021-06-12 20:02:25,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:25,415 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 537 transitions. [2021-06-12 20:02:25,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:25,415 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 537 transitions. [2021-06-12 20:02:25,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:25,416 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:25,416 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:25,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4124,538 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:25,616 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:25,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:25,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1671737627, now seen corresponding path program 538 times [2021-06-12 20:02:25,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:25,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695382157] [2021-06-12 20:02:25,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:25,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:25,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695382157] [2021-06-12 20:02:25,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695382157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:25,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942657343] [2021-06-12 20:02:25,907 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 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 [2021-06-12 20:02:25,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:25,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:25,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:02:25,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:26,216 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 20:02:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:26,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942657343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:26,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:26,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:02:26,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234942338] [2021-06-12 20:02:26,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:02:26,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:26,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:02:26,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:02:26,470 INFO L87 Difference]: Start difference. First operand 243 states and 537 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:27,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:27,551 INFO L93 Difference]: Finished difference Result 290 states and 611 transitions. [2021-06-12 20:02:27,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:02:27,552 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:27,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:27,552 INFO L225 Difference]: With dead ends: 290 [2021-06-12 20:02:27,552 INFO L226 Difference]: Without dead ends: 266 [2021-06-12 20:02:27,552 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1433.0ms TimeCoverageRelationStatistics Valid=156, Invalid=1326, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:02:27,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-12 20:02:27,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 242. [2021-06-12 20:02:27,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.215767634854772) internal successors, (534), 241 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:27,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 534 transitions. [2021-06-12 20:02:27,554 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 534 transitions. Word has length 20 [2021-06-12 20:02:27,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:27,554 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 534 transitions. [2021-06-12 20:02:27,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:27,555 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 534 transitions. [2021-06-12 20:02:27,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:27,555 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:27,555 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:27,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4139,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:27,755 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:27,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:27,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1765944419, now seen corresponding path program 539 times [2021-06-12 20:02:27,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:27,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8008461] [2021-06-12 20:02:27,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:27,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:27,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8008461] [2021-06-12 20:02:27,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8008461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:27,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406121802] [2021-06-12 20:02:27,997 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 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 [2021-06-12 20:02:28,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:02:28,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:28,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:02:28,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:28,339 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:02:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:28,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406121802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:28,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:28,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:02:28,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89571963] [2021-06-12 20:02:28,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:02:28,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:28,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:02:28,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:02:28,507 INFO L87 Difference]: Start difference. First operand 242 states and 534 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:29,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:29,042 INFO L93 Difference]: Finished difference Result 259 states and 559 transitions. [2021-06-12 20:02:29,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:02:29,043 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:29,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:29,043 INFO L225 Difference]: With dead ends: 259 [2021-06-12 20:02:29,043 INFO L226 Difference]: Without dead ends: 246 [2021-06-12 20:02:29,043 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 938.9ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:02:29,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-12 20:02:29,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2021-06-12 20:02:29,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.2148760330578514) internal successors, (536), 242 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:29,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 536 transitions. [2021-06-12 20:02:29,045 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 536 transitions. Word has length 20 [2021-06-12 20:02:29,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:29,045 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 536 transitions. [2021-06-12 20:02:29,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:29,045 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 536 transitions. [2021-06-12 20:02:29,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:29,045 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:29,045 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:29,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4151,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:29,246 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:29,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:29,246 INFO L82 PathProgramCache]: Analyzing trace with hash 188602689, now seen corresponding path program 540 times [2021-06-12 20:02:29,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:29,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44501308] [2021-06-12 20:02:29,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:29,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:29,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:29,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44501308] [2021-06-12 20:02:29,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44501308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:29,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648896184] [2021-06-12 20:02:29,517 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 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 [2021-06-12 20:02:29,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:02:29,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:29,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:02:29,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:29,992 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:29,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648896184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:29,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:29,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:02:29,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135461635] [2021-06-12 20:02:29,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:02:29,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:29,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:02:29,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:02:29,994 INFO L87 Difference]: Start difference. First operand 243 states and 536 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:31,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:31,332 INFO L93 Difference]: Finished difference Result 284 states and 605 transitions. [2021-06-12 20:02:31,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:02:31,332 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:31,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:31,332 INFO L225 Difference]: With dead ends: 284 [2021-06-12 20:02:31,332 INFO L226 Difference]: Without dead ends: 270 [2021-06-12 20:02:31,333 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1551.0ms TimeCoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:02:31,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-12 20:02:31,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 242. [2021-06-12 20:02:31,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.215767634854772) internal successors, (534), 241 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:31,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 534 transitions. [2021-06-12 20:02:31,335 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 534 transitions. Word has length 20 [2021-06-12 20:02:31,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:31,335 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 534 transitions. [2021-06-12 20:02:31,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:31,335 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 534 transitions. [2021-06-12 20:02:31,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:31,335 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:31,335 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:31,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4163 [2021-06-12 20:02:31,535 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:31,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:31,536 INFO L82 PathProgramCache]: Analyzing trace with hash 694948955, now seen corresponding path program 541 times [2021-06-12 20:02:31,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:31,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231148938] [2021-06-12 20:02:31,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:31,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:31,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231148938] [2021-06-12 20:02:31,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231148938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:31,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112443037] [2021-06-12 20:02:31,743 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 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 [2021-06-12 20:02:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:31,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:02:31,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:32,111 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:02:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:32,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112443037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:32,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:32,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:02:32,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799955688] [2021-06-12 20:02:32,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:02:32,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:32,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:02:32,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:02:32,241 INFO L87 Difference]: Start difference. First operand 242 states and 534 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:33,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:33,075 INFO L93 Difference]: Finished difference Result 283 states and 601 transitions. [2021-06-12 20:02:33,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:02:33,075 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:33,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:33,076 INFO L225 Difference]: With dead ends: 283 [2021-06-12 20:02:33,076 INFO L226 Difference]: Without dead ends: 265 [2021-06-12 20:02:33,076 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1037.7ms TimeCoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:02:33,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-12 20:02:33,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 240. [2021-06-12 20:02:33,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.217573221757322) internal successors, (530), 239 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) [2021-06-12 20:02:33,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 530 transitions. [2021-06-12 20:02:33,078 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 530 transitions. Word has length 20 [2021-06-12 20:02:33,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:33,078 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 530 transitions. [2021-06-12 20:02:33,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:33,078 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 530 transitions. [2021-06-12 20:02:33,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:33,078 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:33,079 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:33,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 542 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4176 [2021-06-12 20:02:33,302 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:33,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:33,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1243532289, now seen corresponding path program 542 times [2021-06-12 20:02:33,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:33,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270988575] [2021-06-12 20:02:33,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:33,562 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:33,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:33,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270988575] [2021-06-12 20:02:33,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270988575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:33,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970430353] [2021-06-12 20:02:33,562 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 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 [2021-06-12 20:02:33,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:33,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:33,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:02:33,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:33,861 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 20:02:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:34,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970430353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:34,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:34,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:02:34,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768088157] [2021-06-12 20:02:34,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:02:34,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:34,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:02:34,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:34,072 INFO L87 Difference]: Start difference. First operand 240 states and 530 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:34,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:34,474 INFO L93 Difference]: Finished difference Result 259 states and 558 transitions. [2021-06-12 20:02:34,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:02:34,475 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:34,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:34,475 INFO L225 Difference]: With dead ends: 259 [2021-06-12 20:02:34,475 INFO L226 Difference]: Without dead ends: 244 [2021-06-12 20:02:34,475 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 848.3ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:02:34,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-12 20:02:34,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 241. [2021-06-12 20:02:34,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.216666666666667) internal successors, (532), 240 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:34,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 532 transitions. [2021-06-12 20:02:34,477 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 532 transitions. Word has length 20 [2021-06-12 20:02:34,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:34,477 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 532 transitions. [2021-06-12 20:02:34,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:34,477 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 532 transitions. [2021-06-12 20:02:34,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:34,477 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:34,477 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:34,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4188 [2021-06-12 20:02:34,678 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:34,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:34,678 INFO L82 PathProgramCache]: Analyzing trace with hash -409421085, now seen corresponding path program 543 times [2021-06-12 20:02:34,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:34,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585339110] [2021-06-12 20:02:34,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:34,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:34,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585339110] [2021-06-12 20:02:34,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585339110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:34,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379748743] [2021-06-12 20:02:34,900 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 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 [2021-06-12 20:02:34,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:02:34,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:34,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 20:02:34,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:35,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379748743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:35,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:35,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:02:35,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395070064] [2021-06-12 20:02:35,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:02:35,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:35,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:02:35,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:35,366 INFO L87 Difference]: Start difference. First operand 241 states and 532 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:35,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:35,874 INFO L93 Difference]: Finished difference Result 258 states and 557 transitions. [2021-06-12 20:02:35,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:02:35,874 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:35,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:35,874 INFO L225 Difference]: With dead ends: 258 [2021-06-12 20:02:35,874 INFO L226 Difference]: Without dead ends: 245 [2021-06-12 20:02:35,875 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 834.7ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:02:35,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-12 20:02:35,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2021-06-12 20:02:35,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.215767634854772) internal successors, (534), 241 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:35,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 534 transitions. [2021-06-12 20:02:35,876 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 534 transitions. Word has length 20 [2021-06-12 20:02:35,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:35,877 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 534 transitions. [2021-06-12 20:02:35,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:35,877 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 534 transitions. [2021-06-12 20:02:35,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:35,877 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:35,877 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:36,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 544 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4200 [2021-06-12 20:02:36,077 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:36,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:36,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1986762815, now seen corresponding path program 544 times [2021-06-12 20:02:36,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:36,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491548154] [2021-06-12 20:02:36,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:36,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:36,302 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:36,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:36,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491548154] [2021-06-12 20:02:36,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491548154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:36,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518802603] [2021-06-12 20:02:36,303 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 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 [2021-06-12 20:02:36,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:36,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:36,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:02:36,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:36,600 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 20:02:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:36,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518802603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:36,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:36,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:02:36,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728536503] [2021-06-12 20:02:36,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:02:36,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:36,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:02:36,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:36,840 INFO L87 Difference]: Start difference. First operand 242 states and 534 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:38,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:38,416 INFO L93 Difference]: Finished difference Result 317 states and 664 transitions. [2021-06-12 20:02:38,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:02:38,417 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:38,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:38,417 INFO L225 Difference]: With dead ends: 317 [2021-06-12 20:02:38,417 INFO L226 Difference]: Without dead ends: 299 [2021-06-12 20:02:38,417 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1906.1ms TimeCoverageRelationStatistics Valid=249, Invalid=1643, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:02:38,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-06-12 20:02:38,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 240. [2021-06-12 20:02:38,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.217573221757322) internal successors, (530), 239 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) [2021-06-12 20:02:38,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 530 transitions. [2021-06-12 20:02:38,420 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 530 transitions. Word has length 20 [2021-06-12 20:02:38,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:38,420 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 530 transitions. [2021-06-12 20:02:38,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:38,420 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 530 transitions. [2021-06-12 20:02:38,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:38,420 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:38,420 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:38,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4214 [2021-06-12 20:02:38,620 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:38,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:38,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1288305703, now seen corresponding path program 545 times [2021-06-12 20:02:38,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:38,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967423624] [2021-06-12 20:02:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:38,813 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:38,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:38,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967423624] [2021-06-12 20:02:38,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967423624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:38,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277032015] [2021-06-12 20:02:38,813 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 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 [2021-06-12 20:02:38,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:02:38,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:38,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:02:38,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:39,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277032015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:39,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:39,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:02:39,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574863046] [2021-06-12 20:02:39,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:02:39,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:39,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:02:39,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:39,208 INFO L87 Difference]: Start difference. First operand 240 states and 530 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:40,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:40,066 INFO L93 Difference]: Finished difference Result 297 states and 623 transitions. [2021-06-12 20:02:40,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:02:40,067 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:40,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:40,067 INFO L225 Difference]: With dead ends: 297 [2021-06-12 20:02:40,067 INFO L226 Difference]: Without dead ends: 281 [2021-06-12 20:02:40,067 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 918.0ms TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:02:40,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-12 20:02:40,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 237. [2021-06-12 20:02:40,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.2161016949152543) internal successors, (523), 236 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 523 transitions. [2021-06-12 20:02:40,069 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 523 transitions. Word has length 20 [2021-06-12 20:02:40,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:40,069 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 523 transitions. [2021-06-12 20:02:40,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:40,069 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 523 transitions. [2021-06-12 20:02:40,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:40,070 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:40,070 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:40,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4226,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:40,270 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:40,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:40,270 INFO L82 PathProgramCache]: Analyzing trace with hash -625098845, now seen corresponding path program 546 times [2021-06-12 20:02:40,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:40,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667079666] [2021-06-12 20:02:40,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:40,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:40,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667079666] [2021-06-12 20:02:40,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667079666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:40,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167338422] [2021-06-12 20:02:40,505 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 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 [2021-06-12 20:02:40,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:02:40,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:40,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-12 20:02:40,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:40,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167338422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:40,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:40,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:02:40,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478799036] [2021-06-12 20:02:40,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:02:40,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:40,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:02:40,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:40,944 INFO L87 Difference]: Start difference. First operand 237 states and 523 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:41,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:41,560 INFO L93 Difference]: Finished difference Result 281 states and 589 transitions. [2021-06-12 20:02:41,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:02:41,560 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:41,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:41,560 INFO L225 Difference]: With dead ends: 281 [2021-06-12 20:02:41,560 INFO L226 Difference]: Without dead ends: 261 [2021-06-12 20:02:41,561 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 898.4ms TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:02:41,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-12 20:02:41,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2021-06-12 20:02:41,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.216666666666667) internal successors, (532), 240 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:41,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 532 transitions. [2021-06-12 20:02:41,563 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 532 transitions. Word has length 20 [2021-06-12 20:02:41,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:41,563 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 532 transitions. [2021-06-12 20:02:41,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:41,564 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 532 transitions. [2021-06-12 20:02:41,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:41,564 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:41,564 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:41,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4238,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:41,773 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:41,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:41,773 INFO L82 PathProgramCache]: Analyzing trace with hash 2092526721, now seen corresponding path program 547 times [2021-06-12 20:02:41,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:41,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40988093] [2021-06-12 20:02:41,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:42,124 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:42,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:42,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40988093] [2021-06-12 20:02:42,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40988093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:42,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402524837] [2021-06-12 20:02:42,124 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 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 [2021-06-12 20:02:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:42,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:02:42,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:42,453 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:02:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:42,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402524837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:42,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:42,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:02:42,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395682220] [2021-06-12 20:02:42,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:02:42,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:42,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:02:42,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:42,636 INFO L87 Difference]: Start difference. First operand 241 states and 532 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:43,549 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-06-12 20:02:43,871 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2021-06-12 20:02:44,157 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2021-06-12 20:02:44,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:44,496 INFO L93 Difference]: Finished difference Result 309 states and 648 transitions. [2021-06-12 20:02:44,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:02:44,496 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:44,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:44,496 INFO L225 Difference]: With dead ends: 309 [2021-06-12 20:02:44,496 INFO L226 Difference]: Without dead ends: 291 [2021-06-12 20:02:44,497 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 2169.8ms TimeCoverageRelationStatistics Valid=222, Invalid=1670, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:02:44,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-06-12 20:02:44,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 244. [2021-06-12 20:02:44,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.2263374485596708) internal successors, (541), 243 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:44,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 541 transitions. [2021-06-12 20:02:44,499 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 541 transitions. Word has length 20 [2021-06-12 20:02:44,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:44,499 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 541 transitions. [2021-06-12 20:02:44,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:44,499 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 541 transitions. [2021-06-12 20:02:44,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:44,499 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:44,499 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:44,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4252 [2021-06-12 20:02:44,700 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:44,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:44,700 INFO L82 PathProgramCache]: Analyzing trace with hash -361502979, now seen corresponding path program 548 times [2021-06-12 20:02:44,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:44,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079339671] [2021-06-12 20:02:44,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:44,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:44,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079339671] [2021-06-12 20:02:44,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079339671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:44,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731863] [2021-06-12 20:02:44,914 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 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 [2021-06-12 20:02:44,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:44,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:44,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:02:44,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:45,269 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:02:45,388 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:45,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:45,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:45,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:02:45,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420020265] [2021-06-12 20:02:45,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:02:45,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:45,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:02:45,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:45,389 INFO L87 Difference]: Start difference. First operand 244 states and 541 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:46,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:46,613 INFO L93 Difference]: Finished difference Result 315 states and 660 transitions. [2021-06-12 20:02:46,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:02:46,613 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:46,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:46,613 INFO L225 Difference]: With dead ends: 315 [2021-06-12 20:02:46,613 INFO L226 Difference]: Without dead ends: 296 [2021-06-12 20:02:46,614 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1399.0ms TimeCoverageRelationStatistics Valid=185, Invalid=1455, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:02:46,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-12 20:02:46,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 247. [2021-06-12 20:02:46,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.227642276422764) internal successors, (548), 246 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:46,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 548 transitions. [2021-06-12 20:02:46,616 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 548 transitions. Word has length 20 [2021-06-12 20:02:46,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:46,616 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 548 transitions. [2021-06-12 20:02:46,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:46,616 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 548 transitions. [2021-06-12 20:02:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:46,616 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:46,616 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:46,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4264,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:46,817 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:46,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:46,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1115738049, now seen corresponding path program 549 times [2021-06-12 20:02:46,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:46,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91160741] [2021-06-12 20:02:46,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:47,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:47,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91160741] [2021-06-12 20:02:47,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91160741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:47,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305486150] [2021-06-12 20:02:47,040 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 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 [2021-06-12 20:02:47,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:02:47,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:47,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-12 20:02:47,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:47,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305486150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:47,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:47,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:02:47,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356917441] [2021-06-12 20:02:47,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:02:47,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:47,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:02:47,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:47,470 INFO L87 Difference]: Start difference. First operand 247 states and 548 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:48,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:48,252 INFO L93 Difference]: Finished difference Result 296 states and 631 transitions. [2021-06-12 20:02:48,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:02:48,252 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:48,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:48,253 INFO L225 Difference]: With dead ends: 296 [2021-06-12 20:02:48,253 INFO L226 Difference]: Without dead ends: 278 [2021-06-12 20:02:48,253 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 987.2ms TimeCoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:02:48,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-12 20:02:48,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 251. [2021-06-12 20:02:48,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.224) internal successors, (556), 250 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) [2021-06-12 20:02:48,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 556 transitions. [2021-06-12 20:02:48,255 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 556 transitions. Word has length 20 [2021-06-12 20:02:48,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:48,255 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 556 transitions. [2021-06-12 20:02:48,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:48,255 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 556 transitions. [2021-06-12 20:02:48,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:48,255 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:48,255 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:48,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4277 [2021-06-12 20:02:48,456 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:48,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:48,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1912473801, now seen corresponding path program 550 times [2021-06-12 20:02:48,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:48,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496408865] [2021-06-12 20:02:48,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:48,642 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:48,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:48,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496408865] [2021-06-12 20:02:48,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496408865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:48,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170420825] [2021-06-12 20:02:48,643 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 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 [2021-06-12 20:02:48,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:48,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:48,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:02:48,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:49,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170420825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:49,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:49,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:02:49,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591661675] [2021-06-12 20:02:49,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:02:49,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:49,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:02:49,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:49,025 INFO L87 Difference]: Start difference. First operand 251 states and 556 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:50,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:50,762 INFO L93 Difference]: Finished difference Result 357 states and 733 transitions. [2021-06-12 20:02:50,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:02:50,763 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:50,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:50,763 INFO L225 Difference]: With dead ends: 357 [2021-06-12 20:02:50,763 INFO L226 Difference]: Without dead ends: 314 [2021-06-12 20:02:50,763 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1771.3ms TimeCoverageRelationStatistics Valid=291, Invalid=1965, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:02:50,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-06-12 20:02:50,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 254. [2021-06-12 20:02:50,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.225296442687747) internal successors, (563), 253 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:50,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 563 transitions. [2021-06-12 20:02:50,766 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 563 transitions. Word has length 20 [2021-06-12 20:02:50,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:50,766 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 563 transitions. [2021-06-12 20:02:50,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:50,766 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 563 transitions. [2021-06-12 20:02:50,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:50,766 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:50,766 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:50,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4291,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:50,967 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:50,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:50,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1876147229, now seen corresponding path program 551 times [2021-06-12 20:02:50,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:50,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810349925] [2021-06-12 20:02:50,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:50,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:51,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:51,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810349925] [2021-06-12 20:02:51,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810349925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:51,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586575872] [2021-06-12 20:02:51,163 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 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 [2021-06-12 20:02:51,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:02:51,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:51,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:02:51,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:51,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586575872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:51,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:51,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:02:51,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865249243] [2021-06-12 20:02:51,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:02:51,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:51,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:02:51,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:51,641 INFO L87 Difference]: Start difference. First operand 254 states and 563 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:52,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:52,643 INFO L93 Difference]: Finished difference Result 332 states and 704 transitions. [2021-06-12 20:02:52,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:02:52,643 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:52,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:52,644 INFO L225 Difference]: With dead ends: 332 [2021-06-12 20:02:52,644 INFO L226 Difference]: Without dead ends: 313 [2021-06-12 20:02:52,644 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1155.2ms TimeCoverageRelationStatistics Valid=134, Invalid=1198, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:02:52,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-12 20:02:52,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 256. [2021-06-12 20:02:52,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.231372549019608) internal successors, (569), 255 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:52,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 569 transitions. [2021-06-12 20:02:52,646 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 569 transitions. Word has length 20 [2021-06-12 20:02:52,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:52,646 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 569 transitions. [2021-06-12 20:02:52,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:52,646 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 569 transitions. [2021-06-12 20:02:52,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:52,647 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:52,647 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:52,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4303,552 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:52,847 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:52,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:52,847 INFO L82 PathProgramCache]: Analyzing trace with hash -500831717, now seen corresponding path program 552 times [2021-06-12 20:02:52,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:52,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502890990] [2021-06-12 20:02:52,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:53,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:53,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502890990] [2021-06-12 20:02:53,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502890990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:53,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260849906] [2021-06-12 20:02:53,104 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 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 [2021-06-12 20:02:53,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:02:53,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:53,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:02:53,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:53,403 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 20:02:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:53,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260849906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:53,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:53,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:02:53,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533620708] [2021-06-12 20:02:53,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:02:53,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:53,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:02:53,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:53,616 INFO L87 Difference]: Start difference. First operand 256 states and 569 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:54,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:54,012 INFO L93 Difference]: Finished difference Result 275 states and 597 transitions. [2021-06-12 20:02:54,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:02:54,012 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:54,012 INFO L225 Difference]: With dead ends: 275 [2021-06-12 20:02:54,012 INFO L226 Difference]: Without dead ends: 260 [2021-06-12 20:02:54,012 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 848.8ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:02:54,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-12 20:02:54,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 257. [2021-06-12 20:02:54,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.23046875) internal successors, (571), 256 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:54,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 571 transitions. [2021-06-12 20:02:54,014 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 571 transitions. Word has length 20 [2021-06-12 20:02:54,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:54,014 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 571 transitions. [2021-06-12 20:02:54,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:54,014 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 571 transitions. [2021-06-12 20:02:54,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:54,015 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:54,015 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:54,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4317,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:54,215 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:54,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:54,215 INFO L82 PathProgramCache]: Analyzing trace with hash 2141182205, now seen corresponding path program 553 times [2021-06-12 20:02:54,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:54,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333261412] [2021-06-12 20:02:54,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:54,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:54,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333261412] [2021-06-12 20:02:54,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333261412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:54,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612371925] [2021-06-12 20:02:54,487 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 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 [2021-06-12 20:02:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:54,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:02:54,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:54,797 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 20:02:55,021 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:55,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612371925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:55,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:55,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:02:55,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033465051] [2021-06-12 20:02:55,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:02:55,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:55,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:02:55,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:55,022 INFO L87 Difference]: Start difference. First operand 257 states and 571 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:55,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:55,500 INFO L93 Difference]: Finished difference Result 274 states and 596 transitions. [2021-06-12 20:02:55,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:02:55,500 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:55,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:55,501 INFO L225 Difference]: With dead ends: 274 [2021-06-12 20:02:55,501 INFO L226 Difference]: Without dead ends: 261 [2021-06-12 20:02:55,501 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 899.7ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:02:55,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-12 20:02:55,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 258. [2021-06-12 20:02:55,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.2295719844357977) internal successors, (573), 257 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:55,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 573 transitions. [2021-06-12 20:02:55,503 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 573 transitions. Word has length 20 [2021-06-12 20:02:55,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:55,503 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 573 transitions. [2021-06-12 20:02:55,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:55,503 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 573 transitions. [2021-06-12 20:02:55,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:55,503 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:55,503 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:55,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4329 [2021-06-12 20:02:55,704 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:55,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:55,704 INFO L82 PathProgramCache]: Analyzing trace with hash 563840475, now seen corresponding path program 554 times [2021-06-12 20:02:55,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:55,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983257389] [2021-06-12 20:02:55,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:56,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:56,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983257389] [2021-06-12 20:02:56,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983257389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:56,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956508605] [2021-06-12 20:02:56,007 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 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 [2021-06-12 20:02:56,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:56,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:56,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:02:56,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:56,310 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 20:02:56,564 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:56,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956508605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:56,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:56,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:02:56,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430688826] [2021-06-12 20:02:56,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:02:56,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:56,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:02:56,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:56,565 INFO L87 Difference]: Start difference. First operand 258 states and 573 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:57,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:57,320 INFO L93 Difference]: Finished difference Result 299 states and 640 transitions. [2021-06-12 20:02:57,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:02:57,320 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:57,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:57,321 INFO L225 Difference]: With dead ends: 299 [2021-06-12 20:02:57,321 INFO L226 Difference]: Without dead ends: 281 [2021-06-12 20:02:57,321 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1216.0ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:02:57,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-12 20:02:57,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 256. [2021-06-12 20:02:57,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.231372549019608) internal successors, (569), 255 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:57,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 569 transitions. [2021-06-12 20:02:57,323 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 569 transitions. Word has length 20 [2021-06-12 20:02:57,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:57,323 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 569 transitions. [2021-06-12 20:02:57,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:57,323 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 569 transitions. [2021-06-12 20:02:57,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:57,323 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:57,323 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:57,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4341,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:57,524 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:57,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:57,524 INFO L82 PathProgramCache]: Analyzing trace with hash 658047267, now seen corresponding path program 555 times [2021-06-12 20:02:57,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:57,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858735555] [2021-06-12 20:02:57,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:57,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:57,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:57,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858735555] [2021-06-12 20:02:57,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858735555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:57,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930977514] [2021-06-12 20:02:57,833 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 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 [2021-06-12 20:02:57,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:02:57,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:57,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:02:57,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:58,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930977514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:58,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:58,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:02:58,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855662974] [2021-06-12 20:02:58,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:02:58,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:58,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:02:58,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:58,283 INFO L87 Difference]: Start difference. First operand 256 states and 569 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:58,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:58,861 INFO L93 Difference]: Finished difference Result 284 states and 611 transitions. [2021-06-12 20:02:58,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:02:58,862 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:02:58,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:58,862 INFO L225 Difference]: With dead ends: 284 [2021-06-12 20:02:58,862 INFO L226 Difference]: Without dead ends: 277 [2021-06-12 20:02:58,862 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 957.2ms TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:02:58,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-12 20:02:58,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 257. [2021-06-12 20:02:58,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.234375) internal successors, (572), 256 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:58,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 572 transitions. [2021-06-12 20:02:58,864 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 572 transitions. Word has length 20 [2021-06-12 20:02:58,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:58,864 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 572 transitions. [2021-06-12 20:02:58,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:58,864 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 572 transitions. [2021-06-12 20:02:58,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:02:58,864 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:58,864 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:59,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4353 [2021-06-12 20:02:59,065 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:59,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:59,065 INFO L82 PathProgramCache]: Analyzing trace with hash -919294463, now seen corresponding path program 556 times [2021-06-12 20:02:59,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:59,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935466510] [2021-06-12 20:02:59,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:59,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:59,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:59,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935466510] [2021-06-12 20:02:59,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935466510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:59,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899094709] [2021-06-12 20:02:59,328 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 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 [2021-06-12 20:02:59,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:59,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:59,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:02:59,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:59,654 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:02:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:59,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899094709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:59,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:59,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:02:59,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021033841] [2021-06-12 20:02:59,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:02:59,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:59,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:02:59,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:59,838 INFO L87 Difference]: Start difference. First operand 257 states and 572 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:00,923 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-06-12 20:03:01,088 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-06-12 20:03:01,265 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-06-12 20:03:01,677 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-06-12 20:03:01,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:01,713 INFO L93 Difference]: Finished difference Result 322 states and 680 transitions. [2021-06-12 20:03:01,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:03:01,713 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:01,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:01,713 INFO L225 Difference]: With dead ends: 322 [2021-06-12 20:03:01,713 INFO L226 Difference]: Without dead ends: 298 [2021-06-12 20:03:01,713 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2143.4ms TimeCoverageRelationStatistics Valid=209, Invalid=1513, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:03:01,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-06-12 20:03:01,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 256. [2021-06-12 20:03:01,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.231372549019608) internal successors, (569), 255 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:01,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 569 transitions. [2021-06-12 20:03:01,716 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 569 transitions. Word has length 20 [2021-06-12 20:03:01,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:01,716 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 569 transitions. [2021-06-12 20:03:01,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:01,716 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 569 transitions. [2021-06-12 20:03:01,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:01,716 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:01,716 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:01,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4368,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:01,916 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:01,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:01,917 INFO L82 PathProgramCache]: Analyzing trace with hash -412948197, now seen corresponding path program 557 times [2021-06-12 20:03:01,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:01,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887715922] [2021-06-12 20:03:01,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:02,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:02,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887715922] [2021-06-12 20:03:02,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887715922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:02,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854293789] [2021-06-12 20:03:02,194 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 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 [2021-06-12 20:03:02,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:03:02,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:02,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:03:02,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:02,552 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:03:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:02,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854293789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:02,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:02,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:03:02,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757255767] [2021-06-12 20:03:02,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:03:02,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:02,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:03:02,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:03:02,679 INFO L87 Difference]: Start difference. First operand 256 states and 569 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:03,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:03,608 INFO L93 Difference]: Finished difference Result 318 states and 667 transitions. [2021-06-12 20:03:03,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:03:03,608 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:03,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:03,608 INFO L225 Difference]: With dead ends: 318 [2021-06-12 20:03:03,609 INFO L226 Difference]: Without dead ends: 300 [2021-06-12 20:03:03,609 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1267.8ms TimeCoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:03:03,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-12 20:03:03,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 256. [2021-06-12 20:03:03,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.231372549019608) internal successors, (569), 255 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:03,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 569 transitions. [2021-06-12 20:03:03,611 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 569 transitions. Word has length 20 [2021-06-12 20:03:03,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:03,611 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 569 transitions. [2021-06-12 20:03:03,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:03,611 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 569 transitions. [2021-06-12 20:03:03,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:03,611 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:03,611 INFO L472 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:03,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4380,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:03,812 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:03,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:03,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1753934048, now seen corresponding path program 558 times [2021-06-12 20:03:03,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:03,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428007216] [2021-06-12 20:03:03,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:03,907 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:03:03,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:03,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428007216] [2021-06-12 20:03:03,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428007216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:03,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409239255] [2021-06-12 20:03:03,907 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 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 [2021-06-12 20:03:03,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:03:03,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:03,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:03:03,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:04,337 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 20:03:04,337 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-06-12 20:03:04,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,349 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 20:03:04,349 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-06-12 20:03:04,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,359 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:03:04,360 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,369 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,369 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:03:04,369 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,380 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 20:03:04,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-06-12 20:03:04,381 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,389 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,390 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 20:03:04,390 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,396 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 29 treesize of output 21 [2021-06-12 20:03:04,397 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,404 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 20:03:04,405 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,411 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 36 treesize of output 26 [2021-06-12 20:03:04,412 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,420 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,420 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:03:04,421 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,429 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,429 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:03:04,429 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,435 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 29 treesize of output 21 [2021-06-12 20:03:04,436 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,443 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,444 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:03:04,444 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,450 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 36 treesize of output 26 [2021-06-12 20:03:04,451 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,459 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,459 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:03:04,460 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,468 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,468 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 20:03:04,468 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 20:03:04,474 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:04,485 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,493 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,493 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:03:04,494 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,501 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,501 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 20:03:04,502 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,509 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,510 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 20:03:04,510 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,518 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,518 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:03:04,519 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,526 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:03:04,527 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,534 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,534 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:03:04,535 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 20:03:04,540 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,550 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,550 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:03:04,550 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,557 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:03:04,559 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,566 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 29 treesize of output 21 [2021-06-12 20:03:04,567 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,587 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 29 treesize of output 21 [2021-06-12 20:03:04,589 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,596 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:03:04,597 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,600 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:04,601 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,609 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:03:04,610 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:04,615 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,622 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:03:04,622 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,629 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,629 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 20:03:04,630 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,634 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 22 treesize of output 16 [2021-06-12 20:03:04,635 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,645 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,645 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 20:03:04,645 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,652 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 20:03:04,653 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,656 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:04,657 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,661 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 36 treesize of output 26 [2021-06-12 20:03:04,662 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,666 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:04,667 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,670 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:04,671 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,678 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:03:04,679 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,685 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:03:04,686 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,692 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,692 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:03:04,693 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,699 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 20:03:04,700 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,703 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:04,704 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,711 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:03:04,712 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,724 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 36 treesize of output 26 [2021-06-12 20:03:04,725 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 20:03:04,729 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,734 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:03:04,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 20:03:04,735 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,737 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:04,738 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 20:03:04,742 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,744 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:04,745 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,811 INFO L628 ElimStorePlain]: treesize reduction 117, result has 34.6 percent of original size [2021-06-12 20:03:04,811 INFO L518 ElimStorePlain]: Eliminatee scoreA vanished before elimination [2021-06-12 20:03:04,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:04,817 INFO L247 ElimStorePlain]: Needed 55 recursive calls to eliminate 3 variables, input treesize:2437, output treesize:44 [2021-06-12 20:03:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:04,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409239255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:04,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:04,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-12 20:03:04,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566779775] [2021-06-12 20:03:04,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:04,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:04,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:04,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:04,913 INFO L87 Difference]: Start difference. First operand 256 states and 569 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) [2021-06-12 20:03:06,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:06,053 INFO L93 Difference]: Finished difference Result 367 states and 764 transitions. [2021-06-12 20:03:06,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:03:06,053 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 20 [2021-06-12 20:03:06,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:06,053 INFO L225 Difference]: With dead ends: 367 [2021-06-12 20:03:06,053 INFO L226 Difference]: Without dead ends: 365 [2021-06-12 20:03:06,054 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1208.5ms TimeCoverageRelationStatistics Valid=201, Invalid=1059, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:03:06,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-12 20:03:06,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 281. [2021-06-12 20:03:06,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.2392857142857143) internal successors, (627), 280 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) [2021-06-12 20:03:06,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 627 transitions. [2021-06-12 20:03:06,056 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 627 transitions. Word has length 20 [2021-06-12 20:03:06,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:06,056 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 627 transitions. [2021-06-12 20:03:06,056 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) [2021-06-12 20:03:06,056 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 627 transitions. [2021-06-12 20:03:06,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:06,056 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:06,056 INFO L472 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:06,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4392 [2021-06-12 20:03:06,257 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:06,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:06,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1878238050, now seen corresponding path program 559 times [2021-06-12 20:03:06,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:06,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054770683] [2021-06-12 20:03:06,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:03:06,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:06,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054770683] [2021-06-12 20:03:06,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054770683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:06,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797519258] [2021-06-12 20:03:06,352 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 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 [2021-06-12 20:03:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:06,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:03:06,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:06,568 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:03:06,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797519258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:06,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:06,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:06,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218145328] [2021-06-12 20:03:06,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:06,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:06,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:06,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:06,569 INFO L87 Difference]: Start difference. First operand 281 states and 627 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) [2021-06-12 20:03:06,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:06,966 INFO L93 Difference]: Finished difference Result 319 states and 697 transitions. [2021-06-12 20:03:06,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:03:06,967 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 20 [2021-06-12 20:03:06,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:06,967 INFO L225 Difference]: With dead ends: 319 [2021-06-12 20:03:06,967 INFO L226 Difference]: Without dead ends: 316 [2021-06-12 20:03:06,967 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 433.1ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:03:06,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-12 20:03:06,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 281. [2021-06-12 20:03:06,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.2357142857142858) internal successors, (626), 280 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) [2021-06-12 20:03:06,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 626 transitions. [2021-06-12 20:03:06,969 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 626 transitions. Word has length 20 [2021-06-12 20:03:06,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:06,970 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 626 transitions. [2021-06-12 20:03:06,970 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) [2021-06-12 20:03:06,970 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 626 transitions. [2021-06-12 20:03:06,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:06,970 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:06,970 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:07,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4450 [2021-06-12 20:03:07,170 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:07,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:07,171 INFO L82 PathProgramCache]: Analyzing trace with hash 383787555, now seen corresponding path program 560 times [2021-06-12 20:03:07,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:07,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293835229] [2021-06-12 20:03:07,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:07,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:07,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293835229] [2021-06-12 20:03:07,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293835229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:07,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554794757] [2021-06-12 20:03:07,353 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 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 [2021-06-12 20:03:07,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:07,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:07,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:03:07,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:07,787 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:07,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554794757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:07,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:07,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:03:07,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643111644] [2021-06-12 20:03:07,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:03:07,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:07,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:03:07,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:03:07,788 INFO L87 Difference]: Start difference. First operand 281 states and 626 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:08,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:08,357 INFO L93 Difference]: Finished difference Result 333 states and 719 transitions. [2021-06-12 20:03:08,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:03:08,357 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:08,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:08,358 INFO L225 Difference]: With dead ends: 333 [2021-06-12 20:03:08,358 INFO L226 Difference]: Without dead ends: 312 [2021-06-12 20:03:08,358 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 827.1ms TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:03:08,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-06-12 20:03:08,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 284. [2021-06-12 20:03:08,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.2367491166077738) internal successors, (633), 283 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:08,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 633 transitions. [2021-06-12 20:03:08,360 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 633 transitions. Word has length 20 [2021-06-12 20:03:08,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:08,360 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 633 transitions. [2021-06-12 20:03:08,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:08,360 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 633 transitions. [2021-06-12 20:03:08,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:08,361 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:08,361 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:08,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4458,561 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:08,561 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:08,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:08,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1682754045, now seen corresponding path program 561 times [2021-06-12 20:03:08,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:08,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111702188] [2021-06-12 20:03:08,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:08,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:08,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:08,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111702188] [2021-06-12 20:03:08,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111702188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:08,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243714062] [2021-06-12 20:03:08,742 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 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 [2021-06-12 20:03:08,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:03:08,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:08,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:03:08,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:09,067 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:03:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:09,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243714062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:09,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:09,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:03:09,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220888897] [2021-06-12 20:03:09,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:03:09,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:09,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:03:09,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:03:09,250 INFO L87 Difference]: Start difference. First operand 284 states and 633 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:10,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:10,067 INFO L93 Difference]: Finished difference Result 338 states and 718 transitions. [2021-06-12 20:03:10,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:03:10,067 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:10,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:10,067 INFO L225 Difference]: With dead ends: 338 [2021-06-12 20:03:10,067 INFO L226 Difference]: Without dead ends: 312 [2021-06-12 20:03:10,067 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1099.7ms TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:03:10,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-06-12 20:03:10,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 285. [2021-06-12 20:03:10,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.23943661971831) internal successors, (636), 284 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) [2021-06-12 20:03:10,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 636 transitions. [2021-06-12 20:03:10,070 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 636 transitions. Word has length 20 [2021-06-12 20:03:10,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:10,070 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 636 transitions. [2021-06-12 20:03:10,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:10,070 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 636 transitions. [2021-06-12 20:03:10,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:10,070 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:10,070 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:10,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4470 [2021-06-12 20:03:10,271 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:10,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:10,271 INFO L82 PathProgramCache]: Analyzing trace with hash 854508981, now seen corresponding path program 562 times [2021-06-12 20:03:10,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:10,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436302153] [2021-06-12 20:03:10,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:10,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:10,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436302153] [2021-06-12 20:03:10,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436302153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:10,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385972884] [2021-06-12 20:03:10,468 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 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 [2021-06-12 20:03:10,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:10,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:10,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:03:10,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:10,819 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:03:10,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:10,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385972884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:10,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:10,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:03:10,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458833739] [2021-06-12 20:03:10,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:03:10,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:10,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:03:10,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:03:10,940 INFO L87 Difference]: Start difference. First operand 285 states and 636 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:11,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:11,723 INFO L93 Difference]: Finished difference Result 330 states and 713 transitions. [2021-06-12 20:03:11,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:03:11,724 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:11,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:11,724 INFO L225 Difference]: With dead ends: 330 [2021-06-12 20:03:11,724 INFO L226 Difference]: Without dead ends: 312 [2021-06-12 20:03:11,724 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1063.9ms TimeCoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:03:11,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-06-12 20:03:11,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 284. [2021-06-12 20:03:11,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.2367491166077738) internal successors, (633), 283 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:11,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 633 transitions. [2021-06-12 20:03:11,726 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 633 transitions. Word has length 20 [2021-06-12 20:03:11,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:11,726 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 633 transitions. [2021-06-12 20:03:11,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:11,727 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 633 transitions. [2021-06-12 20:03:11,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:11,727 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:11,727 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:11,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4483 [2021-06-12 20:03:11,927 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:11,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:11,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1651244733, now seen corresponding path program 563 times [2021-06-12 20:03:11,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:11,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061039632] [2021-06-12 20:03:11,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:11,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:12,102 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:12,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:12,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061039632] [2021-06-12 20:03:12,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061039632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:12,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658501054] [2021-06-12 20:03:12,102 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 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 [2021-06-12 20:03:12,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:03:12,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:12,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:03:12,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:12,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658501054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:12,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:12,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:03:12,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800559312] [2021-06-12 20:03:12,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:03:12,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:12,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:03:12,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:03:12,482 INFO L87 Difference]: Start difference. First operand 284 states and 633 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:13,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:13,168 INFO L93 Difference]: Finished difference Result 347 states and 744 transitions. [2021-06-12 20:03:13,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:03:13,168 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:13,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:13,169 INFO L225 Difference]: With dead ends: 347 [2021-06-12 20:03:13,169 INFO L226 Difference]: Without dead ends: 328 [2021-06-12 20:03:13,169 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 798.7ms TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:03:13,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-06-12 20:03:13,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 285. [2021-06-12 20:03:13,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.23943661971831) internal successors, (636), 284 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) [2021-06-12 20:03:13,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 636 transitions. [2021-06-12 20:03:13,171 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 636 transitions. Word has length 20 [2021-06-12 20:03:13,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:13,171 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 636 transitions. [2021-06-12 20:03:13,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:13,171 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 636 transitions. [2021-06-12 20:03:13,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:13,172 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:13,172 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:13,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4495 [2021-06-12 20:03:13,372 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:13,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:13,372 INFO L82 PathProgramCache]: Analyzing trace with hash 705965373, now seen corresponding path program 564 times [2021-06-12 20:03:13,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:13,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458051902] [2021-06-12 20:03:13,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:13,586 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:13,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:13,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458051902] [2021-06-12 20:03:13,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458051902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:13,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544810829] [2021-06-12 20:03:13,587 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 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 [2021-06-12 20:03:13,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:03:13,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:13,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:03:13,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:13,939 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:03:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:14,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544810829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:14,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:14,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:03:14,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011467056] [2021-06-12 20:03:14,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:03:14,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:14,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:03:14,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:03:14,061 INFO L87 Difference]: Start difference. First operand 285 states and 636 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:15,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:15,526 INFO L93 Difference]: Finished difference Result 373 states and 780 transitions. [2021-06-12 20:03:15,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:03:15,526 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:15,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:15,527 INFO L225 Difference]: With dead ends: 373 [2021-06-12 20:03:15,527 INFO L226 Difference]: Without dead ends: 350 [2021-06-12 20:03:15,527 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1698.9ms TimeCoverageRelationStatistics Valid=241, Invalid=1565, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:03:15,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-12 20:03:15,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 284. [2021-06-12 20:03:15,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.2367491166077738) internal successors, (633), 283 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:15,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 633 transitions. [2021-06-12 20:03:15,529 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 633 transitions. Word has length 20 [2021-06-12 20:03:15,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:15,529 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 633 transitions. [2021-06-12 20:03:15,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:15,529 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 633 transitions. [2021-06-12 20:03:15,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:15,530 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:15,530 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:15,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4507,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:15,730 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:15,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:15,730 INFO L82 PathProgramCache]: Analyzing trace with hash -671736063, now seen corresponding path program 565 times [2021-06-12 20:03:15,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:15,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076649100] [2021-06-12 20:03:15,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:15,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:15,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076649100] [2021-06-12 20:03:15,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076649100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:15,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927664641] [2021-06-12 20:03:15,939 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 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 [2021-06-12 20:03:15,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:15,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:03:15,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:16,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927664641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:16,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:16,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:03:16,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822759086] [2021-06-12 20:03:16,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:03:16,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:16,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:03:16,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:03:16,352 INFO L87 Difference]: Start difference. First operand 284 states and 633 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:17,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:17,408 INFO L93 Difference]: Finished difference Result 342 states and 726 transitions. [2021-06-12 20:03:17,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:03:17,408 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:17,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:17,408 INFO L225 Difference]: With dead ends: 342 [2021-06-12 20:03:17,408 INFO L226 Difference]: Without dead ends: 320 [2021-06-12 20:03:17,409 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1247.1ms TimeCoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:03:17,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-06-12 20:03:17,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 285. [2021-06-12 20:03:17,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.2359154929577465) internal successors, (635), 284 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) [2021-06-12 20:03:17,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 635 transitions. [2021-06-12 20:03:17,411 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 635 transitions. Word has length 20 [2021-06-12 20:03:17,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:17,411 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 635 transitions. [2021-06-12 20:03:17,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:17,411 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 635 transitions. [2021-06-12 20:03:17,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:17,411 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:17,411 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:17,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4520,566 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:17,612 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:17,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:17,612 INFO L82 PathProgramCache]: Analyzing trace with hash -165389797, now seen corresponding path program 566 times [2021-06-12 20:03:17,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:17,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070951891] [2021-06-12 20:03:17,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:17,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:17,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070951891] [2021-06-12 20:03:17,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070951891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:17,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901882652] [2021-06-12 20:03:17,833 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 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 [2021-06-12 20:03:17,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:17,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:17,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:03:17,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:18,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901882652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:18,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:18,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:03:18,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021813726] [2021-06-12 20:03:18,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:03:18,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:18,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:03:18,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:03:18,250 INFO L87 Difference]: Start difference. First operand 285 states and 635 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:19,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:19,377 INFO L93 Difference]: Finished difference Result 351 states and 744 transitions. [2021-06-12 20:03:19,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:03:19,377 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:19,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:19,377 INFO L225 Difference]: With dead ends: 351 [2021-06-12 20:03:19,377 INFO L226 Difference]: Without dead ends: 329 [2021-06-12 20:03:19,378 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1314.3ms TimeCoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:03:19,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-12 20:03:19,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 285. [2021-06-12 20:03:19,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.232394366197183) internal successors, (634), 284 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) [2021-06-12 20:03:19,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 634 transitions. [2021-06-12 20:03:19,380 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 634 transitions. Word has length 20 [2021-06-12 20:03:19,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:19,380 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 634 transitions. [2021-06-12 20:03:19,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:19,380 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 634 transitions. [2021-06-12 20:03:19,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:19,380 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:19,381 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:19,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4532,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:19,597 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:19,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:19,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1732995997, now seen corresponding path program 567 times [2021-06-12 20:03:19,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:19,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22424820] [2021-06-12 20:03:19,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:19,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:19,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:19,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22424820] [2021-06-12 20:03:19,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22424820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:19,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775168050] [2021-06-12 20:03:19,795 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 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 [2021-06-12 20:03:19,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:03:19,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:19,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:03:19,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:20,121 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:03:20,279 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:20,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775168050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:20,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:20,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:03:20,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235092080] [2021-06-12 20:03:20,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:03:20,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:20,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:03:20,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:03:20,280 INFO L87 Difference]: Start difference. First operand 285 states and 634 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:20,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:20,868 INFO L93 Difference]: Finished difference Result 308 states and 677 transitions. [2021-06-12 20:03:20,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:03:20,868 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:20,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:20,869 INFO L225 Difference]: With dead ends: 308 [2021-06-12 20:03:20,869 INFO L226 Difference]: Without dead ends: 295 [2021-06-12 20:03:20,869 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 906.7ms TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:03:20,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-06-12 20:03:20,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 286. [2021-06-12 20:03:20,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.231578947368421) internal successors, (636), 285 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) [2021-06-12 20:03:20,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 636 transitions. [2021-06-12 20:03:20,871 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 636 transitions. Word has length 20 [2021-06-12 20:03:20,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:20,871 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 636 transitions. [2021-06-12 20:03:20,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:20,871 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 636 transitions. [2021-06-12 20:03:20,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:20,871 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:20,872 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:21,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4544,568 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:21,072 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:21,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:21,072 INFO L82 PathProgramCache]: Analyzing trace with hash 984629569, now seen corresponding path program 568 times [2021-06-12 20:03:21,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:21,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695348226] [2021-06-12 20:03:21,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:21,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:21,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695348226] [2021-06-12 20:03:21,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695348226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:21,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643796474] [2021-06-12 20:03:21,329 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 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 [2021-06-12 20:03:21,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:21,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:21,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:03:21,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:21,680 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:03:21,869 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:21,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643796474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:21,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:21,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:03:21,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760804290] [2021-06-12 20:03:21,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:03:21,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:21,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:03:21,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:03:21,869 INFO L87 Difference]: Start difference. First operand 286 states and 636 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:22,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:22,713 INFO L93 Difference]: Finished difference Result 327 states and 703 transitions. [2021-06-12 20:03:22,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:03:22,713 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:22,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:22,714 INFO L225 Difference]: With dead ends: 327 [2021-06-12 20:03:22,714 INFO L226 Difference]: Without dead ends: 309 [2021-06-12 20:03:22,714 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1146.3ms TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:03:22,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-12 20:03:22,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 285. [2021-06-12 20:03:22,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.232394366197183) internal successors, (634), 284 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) [2021-06-12 20:03:22,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 634 transitions. [2021-06-12 20:03:22,716 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 634 transitions. Word has length 20 [2021-06-12 20:03:22,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:22,716 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 634 transitions. [2021-06-12 20:03:22,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:22,716 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 634 transitions. [2021-06-12 20:03:22,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:22,717 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:22,717 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:22,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4556 [2021-06-12 20:03:22,917 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:22,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:22,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1490975835, now seen corresponding path program 569 times [2021-06-12 20:03:22,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:22,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942476785] [2021-06-12 20:03:22,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:23,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:23,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942476785] [2021-06-12 20:03:23,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942476785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:23,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562707980] [2021-06-12 20:03:23,185 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 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 [2021-06-12 20:03:23,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:03:23,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:23,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:03:23,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:23,635 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:23,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562707980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:23,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:23,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:03:23,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032176290] [2021-06-12 20:03:23,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:03:23,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:23,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:03:23,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:03:23,636 INFO L87 Difference]: Start difference. First operand 285 states and 634 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:24,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:24,739 INFO L93 Difference]: Finished difference Result 337 states and 716 transitions. [2021-06-12 20:03:24,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:03:24,740 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:24,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:24,740 INFO L225 Difference]: With dead ends: 337 [2021-06-12 20:03:24,740 INFO L226 Difference]: Without dead ends: 323 [2021-06-12 20:03:24,740 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1360.4ms TimeCoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:03:24,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-12 20:03:24,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 285. [2021-06-12 20:03:24,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.232394366197183) internal successors, (634), 284 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) [2021-06-12 20:03:24,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 634 transitions. [2021-06-12 20:03:24,743 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 634 transitions. Word has length 20 [2021-06-12 20:03:24,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:24,743 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 634 transitions. [2021-06-12 20:03:24,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:24,743 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 634 transitions. [2021-06-12 20:03:24,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:24,743 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:24,743 INFO L472 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:24,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4568,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:24,944 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:24,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:24,944 INFO L82 PathProgramCache]: Analyzing trace with hash -637109216, now seen corresponding path program 570 times [2021-06-12 20:03:24,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:24,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534399295] [2021-06-12 20:03:24,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:03:25,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:25,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534399295] [2021-06-12 20:03:25,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534399295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:25,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862040237] [2021-06-12 20:03:25,063 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 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 [2021-06-12 20:03:25,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:03:25,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:25,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 20:03:25,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:03:25,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862040237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:25,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:25,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:03:25,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407851330] [2021-06-12 20:03:25,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:03:25,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:25,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:03:25,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:03:25,340 INFO L87 Difference]: Start difference. First operand 285 states and 634 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) [2021-06-12 20:03:25,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:25,565 INFO L93 Difference]: Finished difference Result 304 states and 670 transitions. [2021-06-12 20:03:25,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:03:25,565 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 20 [2021-06-12 20:03:25,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:25,566 INFO L225 Difference]: With dead ends: 304 [2021-06-12 20:03:25,566 INFO L226 Difference]: Without dead ends: 302 [2021-06-12 20:03:25,566 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 391.5ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:03:25,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-06-12 20:03:25,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 281. [2021-06-12 20:03:25,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.2392857142857143) internal successors, (627), 280 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) [2021-06-12 20:03:25,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 627 transitions. [2021-06-12 20:03:25,568 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 627 transitions. Word has length 20 [2021-06-12 20:03:25,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:25,568 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 627 transitions. [2021-06-12 20:03:25,568 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) [2021-06-12 20:03:25,568 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 627 transitions. [2021-06-12 20:03:25,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:25,568 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:25,569 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:25,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4585 [2021-06-12 20:03:25,769 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:25,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:25,769 INFO L82 PathProgramCache]: Analyzing trace with hash -2007255709, now seen corresponding path program 571 times [2021-06-12 20:03:25,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:25,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615936284] [2021-06-12 20:03:25,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:25,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:25,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615936284] [2021-06-12 20:03:25,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615936284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:25,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294791162] [2021-06-12 20:03:25,948 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 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 [2021-06-12 20:03:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:25,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:03:25,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:26,319 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:26,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294791162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:26,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:26,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:03:26,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961055097] [2021-06-12 20:03:26,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:03:26,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:26,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:03:26,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:03:26,319 INFO L87 Difference]: Start difference. First operand 281 states and 627 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:27,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:27,136 INFO L93 Difference]: Finished difference Result 345 states and 740 transitions. [2021-06-12 20:03:27,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:03:27,136 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:27,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:27,136 INFO L225 Difference]: With dead ends: 345 [2021-06-12 20:03:27,136 INFO L226 Difference]: Without dead ends: 326 [2021-06-12 20:03:27,137 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 965.0ms TimeCoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:03:27,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-12 20:03:27,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 281. [2021-06-12 20:03:27,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.2392857142857143) internal successors, (627), 280 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) [2021-06-12 20:03:27,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 627 transitions. [2021-06-12 20:03:27,139 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 627 transitions. Word has length 20 [2021-06-12 20:03:27,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:27,139 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 627 transitions. [2021-06-12 20:03:27,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:27,139 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 627 transitions. [2021-06-12 20:03:27,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:27,139 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:27,139 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:27,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4595 [2021-06-12 20:03:27,340 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:27,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:27,340 INFO L82 PathProgramCache]: Analyzing trace with hash 7840897, now seen corresponding path program 572 times [2021-06-12 20:03:27,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:27,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107913938] [2021-06-12 20:03:27,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:27,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:27,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:27,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107913938] [2021-06-12 20:03:27,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107913938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:27,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185645790] [2021-06-12 20:03:27,528 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 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 [2021-06-12 20:03:27,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:27,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:27,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:03:27,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:27,878 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:03:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:28,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185645790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:28,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:28,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:03:28,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323390978] [2021-06-12 20:03:28,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:03:28,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:28,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:03:28,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:03:28,005 INFO L87 Difference]: Start difference. First operand 281 states and 627 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:28,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:28,704 INFO L93 Difference]: Finished difference Result 336 states and 729 transitions. [2021-06-12 20:03:28,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:03:28,704 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:28,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:28,705 INFO L225 Difference]: With dead ends: 336 [2021-06-12 20:03:28,705 INFO L226 Difference]: Without dead ends: 318 [2021-06-12 20:03:28,705 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 932.4ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:03:28,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-12 20:03:28,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 282. [2021-06-12 20:03:28,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.2419928825622777) internal successors, (630), 281 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:28,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 630 transitions. [2021-06-12 20:03:28,707 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 630 transitions. Word has length 20 [2021-06-12 20:03:28,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:28,707 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 630 transitions. [2021-06-12 20:03:28,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:28,707 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 630 transitions. [2021-06-12 20:03:28,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:28,707 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:28,707 INFO L472 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:28,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4607,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:28,908 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:28,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:28,908 INFO L82 PathProgramCache]: Analyzing trace with hash 691347580, now seen corresponding path program 573 times [2021-06-12 20:03:28,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:28,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817885682] [2021-06-12 20:03:28,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:03:29,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:29,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817885682] [2021-06-12 20:03:29,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817885682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:29,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726961276] [2021-06-12 20:03:29,028 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 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 [2021-06-12 20:03:29,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:03:29,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:29,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:03:29,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:29,303 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:03:29,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726961276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:29,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:29,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:03:29,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865177758] [2021-06-12 20:03:29,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:29,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:29,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:29,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:29,304 INFO L87 Difference]: Start difference. First operand 282 states and 630 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) [2021-06-12 20:03:29,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:29,546 INFO L93 Difference]: Finished difference Result 298 states and 660 transitions. [2021-06-12 20:03:29,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:03:29,546 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 20 [2021-06-12 20:03:29,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:29,546 INFO L225 Difference]: With dead ends: 298 [2021-06-12 20:03:29,546 INFO L226 Difference]: Without dead ends: 298 [2021-06-12 20:03:29,547 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 432.1ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:03:29,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-06-12 20:03:29,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 281. [2021-06-12 20:03:29,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.2392857142857143) internal successors, (627), 280 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) [2021-06-12 20:03:29,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 627 transitions. [2021-06-12 20:03:29,549 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 627 transitions. Word has length 20 [2021-06-12 20:03:29,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:29,549 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 627 transitions. [2021-06-12 20:03:29,549 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) [2021-06-12 20:03:29,549 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 627 transitions. [2021-06-12 20:03:29,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:29,549 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:29,549 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:29,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4619 [2021-06-12 20:03:29,750 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:29,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:29,750 INFO L82 PathProgramCache]: Analyzing trace with hash 804576649, now seen corresponding path program 574 times [2021-06-12 20:03:29,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:29,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492022270] [2021-06-12 20:03:29,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:29,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:29,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492022270] [2021-06-12 20:03:29,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492022270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:29,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146060281] [2021-06-12 20:03:29,930 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 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 [2021-06-12 20:03:29,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:29,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:29,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:03:29,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:30,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146060281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:30,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:30,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:03:30,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409297471] [2021-06-12 20:03:30,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:03:30,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:30,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:03:30,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:03:30,310 INFO L87 Difference]: Start difference. First operand 281 states and 627 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:31,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:31,582 INFO L93 Difference]: Finished difference Result 365 states and 762 transitions. [2021-06-12 20:03:31,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:03:31,583 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:31,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:31,583 INFO L225 Difference]: With dead ends: 365 [2021-06-12 20:03:31,583 INFO L226 Difference]: Without dead ends: 322 [2021-06-12 20:03:31,583 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1402.9ms TimeCoverageRelationStatistics Valid=223, Invalid=1499, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:03:31,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-12 20:03:31,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 282. [2021-06-12 20:03:31,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.2384341637010676) internal successors, (629), 281 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) [2021-06-12 20:03:31,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 629 transitions. [2021-06-12 20:03:31,586 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 629 transitions. Word has length 20 [2021-06-12 20:03:31,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:31,586 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 629 transitions. [2021-06-12 20:03:31,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:31,586 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 629 transitions. [2021-06-12 20:03:31,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:31,586 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:31,586 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:31,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4627,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:31,786 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:31,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:31,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1310922915, now seen corresponding path program 575 times [2021-06-12 20:03:31,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:31,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060560269] [2021-06-12 20:03:31,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:31,956 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:31,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:31,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060560269] [2021-06-12 20:03:31,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060560269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:31,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902642310] [2021-06-12 20:03:31,956 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 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 [2021-06-12 20:03:31,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:03:31,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:31,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:03:31,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:32,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902642310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:32,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:32,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:03:32,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83194340] [2021-06-12 20:03:32,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:03:32,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:32,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:03:32,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:03:32,419 INFO L87 Difference]: Start difference. First operand 282 states and 629 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:33,020 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-12 20:03:33,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:33,251 INFO L93 Difference]: Finished difference Result 351 states and 752 transitions. [2021-06-12 20:03:33,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:03:33,251 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:33,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:33,251 INFO L225 Difference]: With dead ends: 351 [2021-06-12 20:03:33,251 INFO L226 Difference]: Without dead ends: 332 [2021-06-12 20:03:33,252 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1050.9ms TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:03:33,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-12 20:03:33,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 284. [2021-06-12 20:03:33,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.243816254416961) internal successors, (635), 283 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) [2021-06-12 20:03:33,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 635 transitions. [2021-06-12 20:03:33,254 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 635 transitions. Word has length 20 [2021-06-12 20:03:33,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:33,254 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 635 transitions. [2021-06-12 20:03:33,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:33,254 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 635 transitions. [2021-06-12 20:03:33,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:33,254 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:33,254 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:33,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4640 [2021-06-12 20:03:33,455 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:33,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:33,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1275298075, now seen corresponding path program 576 times [2021-06-12 20:03:33,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:33,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59314772] [2021-06-12 20:03:33,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:33,662 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:33,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:33,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59314772] [2021-06-12 20:03:33,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59314772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:33,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108181354] [2021-06-12 20:03:33,662 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 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 [2021-06-12 20:03:33,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:03:33,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:33,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:03:33,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:34,022 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:03:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:34,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108181354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:34,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:34,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:03:34,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624929961] [2021-06-12 20:03:34,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:03:34,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:34,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:03:34,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:03:34,149 INFO L87 Difference]: Start difference. First operand 284 states and 635 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:34,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:34,826 INFO L93 Difference]: Finished difference Result 330 states and 717 transitions. [2021-06-12 20:03:34,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:03:34,826 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:34,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:34,827 INFO L225 Difference]: With dead ends: 330 [2021-06-12 20:03:34,827 INFO L226 Difference]: Without dead ends: 312 [2021-06-12 20:03:34,827 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 966.6ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:03:34,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-06-12 20:03:34,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 284. [2021-06-12 20:03:34,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.243816254416961) internal successors, (635), 283 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) [2021-06-12 20:03:34,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 635 transitions. [2021-06-12 20:03:34,829 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 635 transitions. Word has length 20 [2021-06-12 20:03:34,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:34,829 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 635 transitions. [2021-06-12 20:03:34,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:34,829 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 635 transitions. [2021-06-12 20:03:34,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:34,830 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:34,830 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:35,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4652,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:35,030 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:35,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:35,030 INFO L82 PathProgramCache]: Analyzing trace with hash 2072033827, now seen corresponding path program 577 times [2021-06-12 20:03:35,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:35,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902680374] [2021-06-12 20:03:35,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:35,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:35,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902680374] [2021-06-12 20:03:35,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902680374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:35,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489780872] [2021-06-12 20:03:35,254 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 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 [2021-06-12 20:03:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:35,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:03:35,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:35,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489780872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:35,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:35,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:03:35,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861401407] [2021-06-12 20:03:35,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:03:35,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:35,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:03:35,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:03:35,639 INFO L87 Difference]: Start difference. First operand 284 states and 635 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:36,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:36,769 INFO L93 Difference]: Finished difference Result 354 states and 750 transitions. [2021-06-12 20:03:36,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:03:36,769 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:36,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:36,770 INFO L225 Difference]: With dead ends: 354 [2021-06-12 20:03:36,770 INFO L226 Difference]: Without dead ends: 332 [2021-06-12 20:03:36,770 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1221.4ms TimeCoverageRelationStatistics Valid=195, Invalid=1287, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:03:36,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-12 20:03:36,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 285. [2021-06-12 20:03:36,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.242957746478873) internal successors, (637), 284 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) [2021-06-12 20:03:36,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 637 transitions. [2021-06-12 20:03:36,772 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 637 transitions. Word has length 20 [2021-06-12 20:03:36,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:36,772 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 637 transitions. [2021-06-12 20:03:36,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:36,773 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 637 transitions. [2021-06-12 20:03:36,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:36,773 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:36,773 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:36,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4664,578 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:36,973 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:36,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:36,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1716587203, now seen corresponding path program 578 times [2021-06-12 20:03:36,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:36,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762985720] [2021-06-12 20:03:36,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:37,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:37,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762985720] [2021-06-12 20:03:37,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762985720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:37,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488427420] [2021-06-12 20:03:37,170 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 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 [2021-06-12 20:03:37,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:37,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:37,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:03:37,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:37,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488427420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:37,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:37,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:03:37,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204249247] [2021-06-12 20:03:37,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:03:37,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:37,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:03:37,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:03:37,639 INFO L87 Difference]: Start difference. First operand 285 states and 637 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:38,154 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-12 20:03:38,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:38,407 INFO L93 Difference]: Finished difference Result 352 states and 756 transitions. [2021-06-12 20:03:38,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:03:38,408 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:38,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:38,408 INFO L225 Difference]: With dead ends: 352 [2021-06-12 20:03:38,408 INFO L226 Difference]: Without dead ends: 333 [2021-06-12 20:03:38,408 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 962.0ms TimeCoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:03:38,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-12 20:03:38,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 285. [2021-06-12 20:03:38,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.242957746478873) internal successors, (637), 284 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) [2021-06-12 20:03:38,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 637 transitions. [2021-06-12 20:03:38,411 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 637 transitions. Word has length 20 [2021-06-12 20:03:38,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:38,411 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 637 transitions. [2021-06-12 20:03:38,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:38,411 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 637 transitions. [2021-06-12 20:03:38,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:38,411 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:38,411 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:38,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4677,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:38,612 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:38,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:38,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1095245155, now seen corresponding path program 579 times [2021-06-12 20:03:38,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:38,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694419088] [2021-06-12 20:03:38,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:38,806 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:38,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:38,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694419088] [2021-06-12 20:03:38,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694419088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:38,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670955545] [2021-06-12 20:03:38,807 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 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 [2021-06-12 20:03:38,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:03:38,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:38,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-12 20:03:38,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:39,321 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:39,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670955545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:39,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:39,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:03:39,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331458765] [2021-06-12 20:03:39,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:03:39,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:39,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:03:39,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:03:39,321 INFO L87 Difference]: Start difference. First operand 285 states and 637 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:40,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:40,874 INFO L93 Difference]: Finished difference Result 425 states and 870 transitions. [2021-06-12 20:03:40,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:03:40,875 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:40,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:40,875 INFO L225 Difference]: With dead ends: 425 [2021-06-12 20:03:40,875 INFO L226 Difference]: Without dead ends: 348 [2021-06-12 20:03:40,875 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1711.5ms TimeCoverageRelationStatistics Valid=260, Invalid=1546, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:03:40,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-12 20:03:40,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 290. [2021-06-12 20:03:40,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.245674740484429) internal successors, (649), 289 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) [2021-06-12 20:03:40,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 649 transitions. [2021-06-12 20:03:40,878 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 649 transitions. Word has length 20 [2021-06-12 20:03:40,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:40,878 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 649 transitions. [2021-06-12 20:03:40,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:40,878 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 649 transitions. [2021-06-12 20:03:40,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:40,878 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:40,878 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:41,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4689,580 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:41,079 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:41,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:41,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1687729479, now seen corresponding path program 580 times [2021-06-12 20:03:41,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:41,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19295773] [2021-06-12 20:03:41,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:41,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:41,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19295773] [2021-06-12 20:03:41,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19295773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:41,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715754967] [2021-06-12 20:03:41,277 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 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 [2021-06-12 20:03:41,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:41,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:41,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:03:41,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:41,766 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:41,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715754967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:41,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:41,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:03:41,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538489105] [2021-06-12 20:03:41,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:03:41,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:41,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:03:41,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:03:41,767 INFO L87 Difference]: Start difference. First operand 290 states and 649 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:42,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:42,743 INFO L93 Difference]: Finished difference Result 336 states and 734 transitions. [2021-06-12 20:03:42,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:03:42,744 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:42,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:42,744 INFO L225 Difference]: With dead ends: 336 [2021-06-12 20:03:42,744 INFO L226 Difference]: Without dead ends: 329 [2021-06-12 20:03:42,744 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1191.9ms TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:03:42,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-12 20:03:42,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 294. [2021-06-12 20:03:42,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.242320819112628) internal successors, (657), 293 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) [2021-06-12 20:03:42,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 657 transitions. [2021-06-12 20:03:42,747 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 657 transitions. Word has length 20 [2021-06-12 20:03:42,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:42,747 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 657 transitions. [2021-06-12 20:03:42,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:42,747 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 657 transitions. [2021-06-12 20:03:42,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:42,747 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:42,747 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:42,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4701,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:42,948 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:42,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:42,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1389676521, now seen corresponding path program 581 times [2021-06-12 20:03:42,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:42,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603393114] [2021-06-12 20:03:42,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:43,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:43,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603393114] [2021-06-12 20:03:43,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603393114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:43,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959318816] [2021-06-12 20:03:43,168 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 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 [2021-06-12 20:03:43,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:03:43,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:43,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:03:43,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:43,707 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:43,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959318816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:43,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:43,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:03:43,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150186334] [2021-06-12 20:03:43,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:03:43,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:43,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:03:43,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:03:43,708 INFO L87 Difference]: Start difference. First operand 294 states and 657 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:44,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:44,321 INFO L93 Difference]: Finished difference Result 318 states and 690 transitions. [2021-06-12 20:03:44,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:03:44,321 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:44,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:44,322 INFO L225 Difference]: With dead ends: 318 [2021-06-12 20:03:44,322 INFO L226 Difference]: Without dead ends: 293 [2021-06-12 20:03:44,322 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1038.4ms TimeCoverageRelationStatistics Valid=121, Invalid=1139, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:03:44,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-06-12 20:03:44,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-06-12 20:03:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.243150684931507) internal successors, (655), 292 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) [2021-06-12 20:03:44,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 655 transitions. [2021-06-12 20:03:44,328 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 655 transitions. Word has length 20 [2021-06-12 20:03:44,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:44,328 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 655 transitions. [2021-06-12 20:03:44,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:44,328 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 655 transitions. [2021-06-12 20:03:44,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:44,328 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:44,328 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:44,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4716 [2021-06-12 20:03:44,529 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:44,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:44,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1252337401, now seen corresponding path program 582 times [2021-06-12 20:03:44,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:44,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926592041] [2021-06-12 20:03:44,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:44,827 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:44,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:44,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926592041] [2021-06-12 20:03:44,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926592041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:44,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64312690] [2021-06-12 20:03:44,827 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 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 [2021-06-12 20:03:44,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:03:44,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:44,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:03:44,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:45,410 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:45,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64312690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:45,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:45,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:03:45,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453199746] [2021-06-12 20:03:45,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:03:45,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:45,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:03:45,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:03:45,410 INFO L87 Difference]: Start difference. First operand 293 states and 655 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:46,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:46,163 INFO L93 Difference]: Finished difference Result 308 states and 677 transitions. [2021-06-12 20:03:46,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:03:46,164 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:46,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:46,164 INFO L225 Difference]: With dead ends: 308 [2021-06-12 20:03:46,164 INFO L226 Difference]: Without dead ends: 295 [2021-06-12 20:03:46,164 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1235.2ms TimeCoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:03:46,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-06-12 20:03:46,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 294. [2021-06-12 20:03:46,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.242320819112628) internal successors, (657), 293 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) [2021-06-12 20:03:46,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 657 transitions. [2021-06-12 20:03:46,167 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 657 transitions. Word has length 20 [2021-06-12 20:03:46,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:46,167 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 657 transitions. [2021-06-12 20:03:46,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:46,167 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 657 transitions. [2021-06-12 20:03:46,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:46,167 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:46,167 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:46,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4728 [2021-06-12 20:03:46,368 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:46,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:46,368 INFO L82 PathProgramCache]: Analyzing trace with hash -325004329, now seen corresponding path program 583 times [2021-06-12 20:03:46,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:46,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647091437] [2021-06-12 20:03:46,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:46,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:46,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647091437] [2021-06-12 20:03:46,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647091437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:46,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571154131] [2021-06-12 20:03:46,680 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 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 [2021-06-12 20:03:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:46,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:03:46,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:47,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571154131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:47,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:47,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:03:47,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502888008] [2021-06-12 20:03:47,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:03:47,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:47,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:03:47,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=595, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:03:47,211 INFO L87 Difference]: Start difference. First operand 294 states and 657 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:48,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:48,842 INFO L93 Difference]: Finished difference Result 342 states and 735 transitions. [2021-06-12 20:03:48,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:03:48,842 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:48,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:48,843 INFO L225 Difference]: With dead ends: 342 [2021-06-12 20:03:48,843 INFO L226 Difference]: Without dead ends: 321 [2021-06-12 20:03:48,843 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1926.7ms TimeCoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:03:48,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-12 20:03:48,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 291. [2021-06-12 20:03:48,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.2448275862068967) internal successors, (651), 290 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) [2021-06-12 20:03:48,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 651 transitions. [2021-06-12 20:03:48,845 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 651 transitions. Word has length 20 [2021-06-12 20:03:48,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:48,845 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 651 transitions. [2021-06-12 20:03:48,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:48,845 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 651 transitions. [2021-06-12 20:03:48,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:48,846 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:48,846 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:49,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4740,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:49,046 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:49,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:49,046 INFO L82 PathProgramCache]: Analyzing trace with hash -122219343, now seen corresponding path program 584 times [2021-06-12 20:03:49,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:49,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812152557] [2021-06-12 20:03:49,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:49,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:49,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812152557] [2021-06-12 20:03:49,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812152557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:49,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65121881] [2021-06-12 20:03:49,306 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 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 [2021-06-12 20:03:49,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:49,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:49,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:03:49,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:49,615 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 20:03:49,835 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:49,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65121881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:49,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:49,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:03:49,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273024741] [2021-06-12 20:03:49,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:03:49,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:49,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:03:49,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:03:49,835 INFO L87 Difference]: Start difference. First operand 291 states and 651 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:50,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:50,382 INFO L93 Difference]: Finished difference Result 308 states and 676 transitions. [2021-06-12 20:03:50,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:03:50,383 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:50,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:50,383 INFO L225 Difference]: With dead ends: 308 [2021-06-12 20:03:50,383 INFO L226 Difference]: Without dead ends: 293 [2021-06-12 20:03:50,383 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1013.5ms TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:03:50,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-06-12 20:03:50,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-06-12 20:03:50,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.243150684931507) internal successors, (655), 292 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) [2021-06-12 20:03:50,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 655 transitions. [2021-06-12 20:03:50,386 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 655 transitions. Word has length 20 [2021-06-12 20:03:50,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:50,386 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 655 transitions. [2021-06-12 20:03:50,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:50,386 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 655 transitions. [2021-06-12 20:03:50,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:50,386 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:50,386 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:50,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4755 [2021-06-12 20:03:50,586 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:50,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:50,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1775172717, now seen corresponding path program 585 times [2021-06-12 20:03:50,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:50,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035366594] [2021-06-12 20:03:50,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:50,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:50,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:50,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035366594] [2021-06-12 20:03:50,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035366594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:50,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614870044] [2021-06-12 20:03:50,782 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 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 [2021-06-12 20:03:50,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:03:50,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:50,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:03:50,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:51,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614870044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:51,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:51,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:03:51,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675379845] [2021-06-12 20:03:51,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:03:51,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:51,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:03:51,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:03:51,271 INFO L87 Difference]: Start difference. First operand 293 states and 655 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:52,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:52,224 INFO L93 Difference]: Finished difference Result 326 states and 714 transitions. [2021-06-12 20:03:52,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:03:52,225 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:52,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:52,225 INFO L225 Difference]: With dead ends: 326 [2021-06-12 20:03:52,225 INFO L226 Difference]: Without dead ends: 319 [2021-06-12 20:03:52,225 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1240.9ms TimeCoverageRelationStatistics Valid=135, Invalid=1271, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:03:52,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-12 20:03:52,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 294. [2021-06-12 20:03:52,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.2457337883959045) internal successors, (658), 293 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) [2021-06-12 20:03:52,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 658 transitions. [2021-06-12 20:03:52,227 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 658 transitions. Word has length 20 [2021-06-12 20:03:52,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:52,228 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 658 transitions. [2021-06-12 20:03:52,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:52,228 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 658 transitions. [2021-06-12 20:03:52,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:52,228 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:52,228 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:52,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4767,586 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:52,428 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:52,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:52,429 INFO L82 PathProgramCache]: Analyzing trace with hash 942452849, now seen corresponding path program 586 times [2021-06-12 20:03:52,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:52,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663682119] [2021-06-12 20:03:52,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:52,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:52,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:52,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663682119] [2021-06-12 20:03:52,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663682119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:52,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051467427] [2021-06-12 20:03:52,783 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 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 [2021-06-12 20:03:52,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:52,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:52,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:03:52,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:53,101 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 20:03:53,394 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:53,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051467427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:53,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:53,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:03:53,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467904968] [2021-06-12 20:03:53,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:03:53,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:53,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:03:53,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:03:53,394 INFO L87 Difference]: Start difference. First operand 294 states and 658 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:54,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:54,505 INFO L93 Difference]: Finished difference Result 347 states and 739 transitions. [2021-06-12 20:03:54,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:03:54,506 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:54,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:54,506 INFO L225 Difference]: With dead ends: 347 [2021-06-12 20:03:54,506 INFO L226 Difference]: Without dead ends: 316 [2021-06-12 20:03:54,506 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1628.8ms TimeCoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:03:54,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-12 20:03:54,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 292. [2021-06-12 20:03:54,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.2439862542955327) internal successors, (653), 291 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) [2021-06-12 20:03:54,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 653 transitions. [2021-06-12 20:03:54,508 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 653 transitions. Word has length 20 [2021-06-12 20:03:54,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:54,509 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 653 transitions. [2021-06-12 20:03:54,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:54,509 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 653 transitions. [2021-06-12 20:03:54,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:54,509 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:54,509 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:54,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4782 [2021-06-12 20:03:54,709 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:54,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:54,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1036659641, now seen corresponding path program 587 times [2021-06-12 20:03:54,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:54,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853525906] [2021-06-12 20:03:54,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:54,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:54,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853525906] [2021-06-12 20:03:54,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853525906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:54,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066459115] [2021-06-12 20:03:54,950 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 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 [2021-06-12 20:03:54,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:03:54,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:54,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:03:54,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:55,292 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:03:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:55,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066459115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:55,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:55,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:03:55,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398375059] [2021-06-12 20:03:55,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:03:55,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:55,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:03:55,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:03:55,464 INFO L87 Difference]: Start difference. First operand 292 states and 653 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:56,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:56,005 INFO L93 Difference]: Finished difference Result 309 states and 679 transitions. [2021-06-12 20:03:56,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:03:56,005 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:56,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:56,005 INFO L225 Difference]: With dead ends: 309 [2021-06-12 20:03:56,005 INFO L226 Difference]: Without dead ends: 296 [2021-06-12 20:03:56,006 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 931.1ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:03:56,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-12 20:03:56,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 294. [2021-06-12 20:03:56,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.242320819112628) internal successors, (657), 293 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) [2021-06-12 20:03:56,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 657 transitions. [2021-06-12 20:03:56,008 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 657 transitions. Word has length 20 [2021-06-12 20:03:56,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:56,008 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 657 transitions. [2021-06-12 20:03:56,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:56,008 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 657 transitions. [2021-06-12 20:03:56,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:56,009 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:56,009 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:56,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 588 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4794 [2021-06-12 20:03:56,209 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:56,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:56,209 INFO L82 PathProgramCache]: Analyzing trace with hash -540682089, now seen corresponding path program 588 times [2021-06-12 20:03:56,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:56,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245817016] [2021-06-12 20:03:56,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:56,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:56,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245817016] [2021-06-12 20:03:56,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245817016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:56,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268305020] [2021-06-12 20:03:56,477 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 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 [2021-06-12 20:03:56,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:03:56,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:56,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:03:56,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:56,946 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:56,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268305020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:56,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:56,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:03:56,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941098373] [2021-06-12 20:03:56,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:03:56,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:56,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:03:56,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:03:56,947 INFO L87 Difference]: Start difference. First operand 294 states and 657 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:58,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:58,269 INFO L93 Difference]: Finished difference Result 342 states and 735 transitions. [2021-06-12 20:03:58,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:03:58,270 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:03:58,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:58,270 INFO L225 Difference]: With dead ends: 342 [2021-06-12 20:03:58,270 INFO L226 Difference]: Without dead ends: 321 [2021-06-12 20:03:58,270 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1599.5ms TimeCoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:03:58,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-12 20:03:58,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 293. [2021-06-12 20:03:58,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.243150684931507) internal successors, (655), 292 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) [2021-06-12 20:03:58,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 655 transitions. [2021-06-12 20:03:58,273 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 655 transitions. Word has length 20 [2021-06-12 20:03:58,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:58,273 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 655 transitions. [2021-06-12 20:03:58,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:58,273 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 655 transitions. [2021-06-12 20:03:58,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:03:58,273 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:58,273 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:58,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 589 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4806 [2021-06-12 20:03:58,474 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:58,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:58,474 INFO L82 PathProgramCache]: Analyzing trace with hash -34335823, now seen corresponding path program 589 times [2021-06-12 20:03:58,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:58,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28069427] [2021-06-12 20:03:58,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:58,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:58,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28069427] [2021-06-12 20:03:58,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28069427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:58,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803192158] [2021-06-12 20:03:58,711 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 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 [2021-06-12 20:03:58,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:58,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:03:58,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:59,077 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:03:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:59,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803192158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:59,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:59,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:03:59,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261762006] [2021-06-12 20:03:59,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:03:59,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:59,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:03:59,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:03:59,211 INFO L87 Difference]: Start difference. First operand 293 states and 655 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:00,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:00,678 INFO L93 Difference]: Finished difference Result 388 states and 813 transitions. [2021-06-12 20:04:00,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:04:00,678 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:00,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:00,679 INFO L225 Difference]: With dead ends: 388 [2021-06-12 20:04:00,679 INFO L226 Difference]: Without dead ends: 363 [2021-06-12 20:04:00,679 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1712.0ms TimeCoverageRelationStatistics Valid=217, Invalid=1675, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:04:00,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-12 20:04:00,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 297. [2021-06-12 20:04:00,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.2567567567567566) internal successors, (668), 296 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) [2021-06-12 20:04:00,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 668 transitions. [2021-06-12 20:04:00,681 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 668 transitions. Word has length 20 [2021-06-12 20:04:00,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:00,681 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 668 transitions. [2021-06-12 20:04:00,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:00,681 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 668 transitions. [2021-06-12 20:04:00,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:00,682 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:00,682 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:00,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4821 [2021-06-12 20:04:00,882 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:00,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:00,882 INFO L82 PathProgramCache]: Analyzing trace with hash 762399929, now seen corresponding path program 590 times [2021-06-12 20:04:00,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:00,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920472555] [2021-06-12 20:04:00,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:01,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:01,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920472555] [2021-06-12 20:04:01,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920472555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:01,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669735471] [2021-06-12 20:04:01,093 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 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 [2021-06-12 20:04:01,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:01,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:01,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:04:01,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:01,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669735471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:01,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:01,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-12 20:04:01,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725799231] [2021-06-12 20:04:01,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:04:01,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:01,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:04:01,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:04:01,553 INFO L87 Difference]: Start difference. First operand 297 states and 668 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:02,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:02,287 INFO L93 Difference]: Finished difference Result 364 states and 787 transitions. [2021-06-12 20:04:02,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:04:02,288 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:02,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:02,288 INFO L225 Difference]: With dead ends: 364 [2021-06-12 20:04:02,288 INFO L226 Difference]: Without dead ends: 345 [2021-06-12 20:04:02,288 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 904.6ms TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:04:02,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-12 20:04:02,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 297. [2021-06-12 20:04:02,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.2567567567567566) internal successors, (668), 296 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) [2021-06-12 20:04:02,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 668 transitions. [2021-06-12 20:04:02,291 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 668 transitions. Word has length 20 [2021-06-12 20:04:02,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:02,291 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 668 transitions. [2021-06-12 20:04:02,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:02,291 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 668 transitions. [2021-06-12 20:04:02,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:02,291 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:02,291 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:02,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4833,591 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:02,492 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:02,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:02,492 INFO L82 PathProgramCache]: Analyzing trace with hash 514247511, now seen corresponding path program 591 times [2021-06-12 20:04:02,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:02,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180373681] [2021-06-12 20:04:02,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:02,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:02,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180373681] [2021-06-12 20:04:02,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180373681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:02,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779354160] [2021-06-12 20:04:02,861 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 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 [2021-06-12 20:04:02,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:04:02,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:02,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:04:02,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:03,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779354160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:03,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:03,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:03,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829897385] [2021-06-12 20:04:03,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:03,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:03,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:03,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:03,298 INFO L87 Difference]: Start difference. First operand 297 states and 668 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:03,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:03,753 INFO L93 Difference]: Finished difference Result 315 states and 695 transitions. [2021-06-12 20:04:03,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:04:03,753 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:03,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:03,753 INFO L225 Difference]: With dead ends: 315 [2021-06-12 20:04:03,753 INFO L226 Difference]: Without dead ends: 300 [2021-06-12 20:04:03,753 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 889.3ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:04:03,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-12 20:04:03,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2021-06-12 20:04:03,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.254180602006689) internal successors, (674), 299 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:03,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 674 transitions. [2021-06-12 20:04:03,757 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 674 transitions. Word has length 20 [2021-06-12 20:04:03,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:03,757 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 674 transitions. [2021-06-12 20:04:03,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:03,757 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 674 transitions. [2021-06-12 20:04:03,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:03,757 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:03,757 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:03,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 592 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4845 [2021-06-12 20:04:03,973 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:03,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:03,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1138705863, now seen corresponding path program 592 times [2021-06-12 20:04:03,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:03,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259687971] [2021-06-12 20:04:03,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:04,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:04,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259687971] [2021-06-12 20:04:04,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259687971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:04,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406426682] [2021-06-12 20:04:04,244 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 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 [2021-06-12 20:04:04,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:04,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:04,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:04:04,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:04,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406426682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:04,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:04,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:04,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027458345] [2021-06-12 20:04:04,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:04,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:04,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:04,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:04,731 INFO L87 Difference]: Start difference. First operand 300 states and 674 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:05,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:05,372 INFO L93 Difference]: Finished difference Result 325 states and 711 transitions. [2021-06-12 20:04:05,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:04:05,372 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:05,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:05,372 INFO L225 Difference]: With dead ends: 325 [2021-06-12 20:04:05,372 INFO L226 Difference]: Without dead ends: 318 [2021-06-12 20:04:05,373 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1045.6ms TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:04:05,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-12 20:04:05,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 301. [2021-06-12 20:04:05,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.256666666666667) internal successors, (677), 300 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) [2021-06-12 20:04:05,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 677 transitions. [2021-06-12 20:04:05,376 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 677 transitions. Word has length 20 [2021-06-12 20:04:05,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:05,376 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 677 transitions. [2021-06-12 20:04:05,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:05,376 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 677 transitions. [2021-06-12 20:04:05,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:05,376 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:05,377 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:05,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4859,593 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:05,581 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:05,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:05,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1578919703, now seen corresponding path program 593 times [2021-06-12 20:04:05,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:05,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438339137] [2021-06-12 20:04:05,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:05,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:05,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438339137] [2021-06-12 20:04:05,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438339137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:05,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720318768] [2021-06-12 20:04:05,909 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 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 [2021-06-12 20:04:05,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:04:05,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:05,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:04:05,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:06,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720318768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:06,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:06,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:06,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466926110] [2021-06-12 20:04:06,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:06,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:06,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:06,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:06,383 INFO L87 Difference]: Start difference. First operand 301 states and 677 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:07,568 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 84 [2021-06-12 20:04:07,862 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 79 [2021-06-12 20:04:08,045 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 82 [2021-06-12 20:04:08,429 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-06-12 20:04:08,582 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-06-12 20:04:08,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:08,925 INFO L93 Difference]: Finished difference Result 380 states and 812 transitions. [2021-06-12 20:04:08,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:04:08,925 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:08,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:08,926 INFO L225 Difference]: With dead ends: 380 [2021-06-12 20:04:08,926 INFO L226 Difference]: Without dead ends: 356 [2021-06-12 20:04:08,926 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 2840.3ms TimeCoverageRelationStatistics Valid=242, Invalid=1920, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:04:08,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-12 20:04:08,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 303. [2021-06-12 20:04:08,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.2582781456953644) internal successors, (682), 302 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:08,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 682 transitions. [2021-06-12 20:04:08,929 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 682 transitions. Word has length 20 [2021-06-12 20:04:08,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:08,929 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 682 transitions. [2021-06-12 20:04:08,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:08,929 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 682 transitions. [2021-06-12 20:04:08,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:08,929 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:08,929 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:09,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4874,594 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:09,129 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:09,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:09,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1381456263, now seen corresponding path program 594 times [2021-06-12 20:04:09,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:09,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146281139] [2021-06-12 20:04:09,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:09,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:09,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146281139] [2021-06-12 20:04:09,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146281139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:09,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50506938] [2021-06-12 20:04:09,363 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 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 [2021-06-12 20:04:09,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:04:09,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:09,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:04:09,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:09,691 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 20:04:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:09,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50506938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:09,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:09,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:09,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522972053] [2021-06-12 20:04:09,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:09,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:09,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:09,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:09,933 INFO L87 Difference]: Start difference. First operand 303 states and 682 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:10,548 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-06-12 20:04:10,869 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2021-06-12 20:04:11,159 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2021-06-12 20:04:11,281 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-06-12 20:04:11,403 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-06-12 20:04:11,779 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2021-06-12 20:04:11,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:11,867 INFO L93 Difference]: Finished difference Result 384 states and 824 transitions. [2021-06-12 20:04:11,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:04:11,867 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:11,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:11,867 INFO L225 Difference]: With dead ends: 384 [2021-06-12 20:04:11,867 INFO L226 Difference]: Without dead ends: 365 [2021-06-12 20:04:11,868 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 2213.7ms TimeCoverageRelationStatistics Valid=248, Invalid=1558, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:04:11,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-12 20:04:11,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 299. [2021-06-12 20:04:11,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.2550335570469797) internal successors, (672), 298 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) [2021-06-12 20:04:11,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 672 transitions. [2021-06-12 20:04:11,870 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 672 transitions. Word has length 20 [2021-06-12 20:04:11,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:11,870 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 672 transitions. [2021-06-12 20:04:11,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:11,870 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 672 transitions. [2021-06-12 20:04:11,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:11,870 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:11,871 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:12,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4889 [2021-06-12 20:04:12,071 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:12,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:12,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1673126495, now seen corresponding path program 595 times [2021-06-12 20:04:12,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:12,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922587087] [2021-06-12 20:04:12,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:12,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:12,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922587087] [2021-06-12 20:04:12,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922587087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:12,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714516226] [2021-06-12 20:04:12,324 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 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 [2021-06-12 20:04:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:12,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:04:12,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:12,637 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:04:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:12,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714516226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:12,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:12,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:12,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568634220] [2021-06-12 20:04:12,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:12,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:12,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:12,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:12,799 INFO L87 Difference]: Start difference. First operand 299 states and 672 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:13,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:13,257 INFO L93 Difference]: Finished difference Result 314 states and 694 transitions. [2021-06-12 20:04:13,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:04:13,257 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:13,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:13,258 INFO L225 Difference]: With dead ends: 314 [2021-06-12 20:04:13,258 INFO L226 Difference]: Without dead ends: 301 [2021-06-12 20:04:13,258 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 874.6ms TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:04:13,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-06-12 20:04:13,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2021-06-12 20:04:13,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.2533333333333334) internal successors, (676), 300 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:13,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 676 transitions. [2021-06-12 20:04:13,260 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 676 transitions. Word has length 20 [2021-06-12 20:04:13,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:13,260 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 676 transitions. [2021-06-12 20:04:13,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:13,260 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 676 transitions. [2021-06-12 20:04:13,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:13,260 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:13,260 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:13,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4902,596 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:13,461 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:13,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:13,461 INFO L82 PathProgramCache]: Analyzing trace with hash 95784765, now seen corresponding path program 596 times [2021-06-12 20:04:13,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:13,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977659944] [2021-06-12 20:04:13,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:13,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:13,694 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:13,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:13,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977659944] [2021-06-12 20:04:13,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977659944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:13,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786905833] [2021-06-12 20:04:13,695 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 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 [2021-06-12 20:04:13,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:13,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:13,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:04:13,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:14,064 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:04:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:14,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786905833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:14,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:14,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:14,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476190505] [2021-06-12 20:04:14,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:14,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:14,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:14,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:14,253 INFO L87 Difference]: Start difference. First operand 301 states and 676 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:15,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:15,022 INFO L93 Difference]: Finished difference Result 327 states and 717 transitions. [2021-06-12 20:04:15,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:04:15,022 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:15,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:15,023 INFO L225 Difference]: With dead ends: 327 [2021-06-12 20:04:15,023 INFO L226 Difference]: Without dead ends: 316 [2021-06-12 20:04:15,023 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1081.6ms TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:04:15,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-12 20:04:15,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 302. [2021-06-12 20:04:15,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.2524916943521593) internal successors, (678), 301 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:15,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 678 transitions. [2021-06-12 20:04:15,025 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 678 transitions. Word has length 20 [2021-06-12 20:04:15,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:15,026 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 678 transitions. [2021-06-12 20:04:15,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:15,026 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 678 transitions. [2021-06-12 20:04:15,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:15,026 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:15,026 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:15,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4914 [2021-06-12 20:04:15,227 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:15,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:15,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1430376095, now seen corresponding path program 597 times [2021-06-12 20:04:15,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:15,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182289343] [2021-06-12 20:04:15,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:15,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:15,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:15,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182289343] [2021-06-12 20:04:15,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182289343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:15,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950931628] [2021-06-12 20:04:15,419 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 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 [2021-06-12 20:04:15,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:04:15,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:15,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:04:15,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:15,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950931628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:15,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:15,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:15,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994219465] [2021-06-12 20:04:15,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:15,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:15,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:15,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:15,843 INFO L87 Difference]: Start difference. First operand 302 states and 678 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:17,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:17,003 INFO L93 Difference]: Finished difference Result 373 states and 802 transitions. [2021-06-12 20:04:17,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:04:17,003 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:17,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:17,003 INFO L225 Difference]: With dead ends: 373 [2021-06-12 20:04:17,003 INFO L226 Difference]: Without dead ends: 354 [2021-06-12 20:04:17,004 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1391.2ms TimeCoverageRelationStatistics Valid=220, Invalid=1502, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:04:17,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-12 20:04:17,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 303. [2021-06-12 20:04:17,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.251655629139073) internal successors, (680), 302 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:17,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 680 transitions. [2021-06-12 20:04:17,007 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 680 transitions. Word has length 20 [2021-06-12 20:04:17,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:17,007 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 680 transitions. [2021-06-12 20:04:17,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:17,007 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 680 transitions. [2021-06-12 20:04:17,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:17,007 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:17,007 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:17,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4926,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:17,208 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:17,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:17,208 INFO L82 PathProgramCache]: Analyzing trace with hash 602131031, now seen corresponding path program 598 times [2021-06-12 20:04:17,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:17,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117739170] [2021-06-12 20:04:17,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:17,461 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:17,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:17,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117739170] [2021-06-12 20:04:17,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117739170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:17,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473694326] [2021-06-12 20:04:17,461 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 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 [2021-06-12 20:04:17,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:17,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:17,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:04:17,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:17,799 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:04:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:17,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473694326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:17,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:17,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:17,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093363983] [2021-06-12 20:04:17,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:17,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:17,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:17,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:17,920 INFO L87 Difference]: Start difference. First operand 303 states and 680 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:18,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:18,651 INFO L93 Difference]: Finished difference Result 356 states and 766 transitions. [2021-06-12 20:04:18,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:04:18,651 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:18,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:18,652 INFO L225 Difference]: With dead ends: 356 [2021-06-12 20:04:18,652 INFO L226 Difference]: Without dead ends: 338 [2021-06-12 20:04:18,652 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1080.9ms TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:04:18,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-12 20:04:18,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 305. [2021-06-12 20:04:18,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.25) internal successors, (684), 304 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:18,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 684 transitions. [2021-06-12 20:04:18,654 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 684 transitions. Word has length 20 [2021-06-12 20:04:18,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:18,654 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 684 transitions. [2021-06-12 20:04:18,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:18,655 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 684 transitions. [2021-06-12 20:04:18,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:18,655 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:18,655 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:18,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4938 [2021-06-12 20:04:18,855 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:18,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:18,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1936722361, now seen corresponding path program 599 times [2021-06-12 20:04:18,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:18,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210139549] [2021-06-12 20:04:18,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:19,078 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:19,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:19,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210139549] [2021-06-12 20:04:19,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210139549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:19,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810870947] [2021-06-12 20:04:19,079 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 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 [2021-06-12 20:04:19,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:04:19,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:19,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:04:19,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:19,429 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:04:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:19,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810870947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:19,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:19,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:19,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928757038] [2021-06-12 20:04:19,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:19,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:19,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:19,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:19,551 INFO L87 Difference]: Start difference. First operand 305 states and 684 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:20,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:20,476 INFO L93 Difference]: Finished difference Result 374 states and 801 transitions. [2021-06-12 20:04:20,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:04:20,476 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:20,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:20,476 INFO L225 Difference]: With dead ends: 374 [2021-06-12 20:04:20,476 INFO L226 Difference]: Without dead ends: 355 [2021-06-12 20:04:20,476 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1139.3ms TimeCoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:04:20,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-06-12 20:04:20,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 306. [2021-06-12 20:04:20,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.2491803278688525) internal successors, (686), 305 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) [2021-06-12 20:04:20,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 686 transitions. [2021-06-12 20:04:20,479 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 686 transitions. Word has length 20 [2021-06-12 20:04:20,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:20,479 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 686 transitions. [2021-06-12 20:04:20,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:20,479 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 686 transitions. [2021-06-12 20:04:20,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:20,479 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:20,479 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:20,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4950,600 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:20,680 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:20,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:20,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1398866783, now seen corresponding path program 600 times [2021-06-12 20:04:20,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:20,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315872092] [2021-06-12 20:04:20,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:20,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:20,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:20,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315872092] [2021-06-12 20:04:20,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315872092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:20,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985358067] [2021-06-12 20:04:20,872 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 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 [2021-06-12 20:04:20,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:04:20,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:20,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:04:20,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:21,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:21,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985358067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:21,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:21,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:21,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116431291] [2021-06-12 20:04:21,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:21,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:21,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:21,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:21,257 INFO L87 Difference]: Start difference. First operand 306 states and 686 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:21,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:21,980 INFO L93 Difference]: Finished difference Result 369 states and 798 transitions. [2021-06-12 20:04:21,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:04:21,980 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:21,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:21,980 INFO L225 Difference]: With dead ends: 369 [2021-06-12 20:04:21,980 INFO L226 Difference]: Without dead ends: 350 [2021-06-12 20:04:21,981 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 773.4ms TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:04:21,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-12 20:04:21,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 306. [2021-06-12 20:04:21,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.2491803278688525) internal successors, (686), 305 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) [2021-06-12 20:04:21,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 686 transitions. [2021-06-12 20:04:21,983 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 686 transitions. Word has length 20 [2021-06-12 20:04:21,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:21,983 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 686 transitions. [2021-06-12 20:04:21,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:21,983 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 686 transitions. [2021-06-12 20:04:21,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:21,984 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:21,984 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:22,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4963,601 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:22,184 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:22,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:22,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1354383623, now seen corresponding path program 601 times [2021-06-12 20:04:22,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:22,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295101364] [2021-06-12 20:04:22,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:22,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:22,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295101364] [2021-06-12 20:04:22,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295101364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:22,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131232710] [2021-06-12 20:04:22,397 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 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 [2021-06-12 20:04:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:22,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:04:22,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:22,733 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:04:22,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:22,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131232710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:22,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:22,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:22,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608582096] [2021-06-12 20:04:22,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:22,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:22,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:22,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:22,897 INFO L87 Difference]: Start difference. First operand 306 states and 686 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:23,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:23,203 INFO L93 Difference]: Finished difference Result 322 states and 710 transitions. [2021-06-12 20:04:23,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:04:23,203 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:23,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:23,204 INFO L225 Difference]: With dead ends: 322 [2021-06-12 20:04:23,204 INFO L226 Difference]: Without dead ends: 309 [2021-06-12 20:04:23,204 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 715.7ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:04:23,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-12 20:04:23,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2021-06-12 20:04:23,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.2467532467532467) internal successors, (692), 308 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) [2021-06-12 20:04:23,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 692 transitions. [2021-06-12 20:04:23,207 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 692 transitions. Word has length 20 [2021-06-12 20:04:23,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:23,207 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 692 transitions. [2021-06-12 20:04:23,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:23,207 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 692 transitions. [2021-06-12 20:04:23,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:23,207 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:23,207 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:23,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4975,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:23,408 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:23,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:23,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1363241943, now seen corresponding path program 602 times [2021-06-12 20:04:23,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:23,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485164331] [2021-06-12 20:04:23,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:23,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:23,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485164331] [2021-06-12 20:04:23,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485164331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:23,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152090072] [2021-06-12 20:04:23,645 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 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 [2021-06-12 20:04:23,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:23,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:23,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:04:23,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:23,977 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:04:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:24,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152090072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:24,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:24,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:24,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011975548] [2021-06-12 20:04:24,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:24,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:24,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:24,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:24,173 INFO L87 Difference]: Start difference. First operand 309 states and 692 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:24,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:24,891 INFO L93 Difference]: Finished difference Result 337 states and 737 transitions. [2021-06-12 20:04:24,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:04:24,891 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:24,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:24,892 INFO L225 Difference]: With dead ends: 337 [2021-06-12 20:04:24,892 INFO L226 Difference]: Without dead ends: 326 [2021-06-12 20:04:24,892 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1090.8ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:04:24,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-12 20:04:24,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 310. [2021-06-12 20:04:24,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.2459546925566345) internal successors, (694), 309 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:24,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 694 transitions. [2021-06-12 20:04:24,894 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 694 transitions. Word has length 20 [2021-06-12 20:04:24,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:24,894 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 694 transitions. [2021-06-12 20:04:24,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:24,894 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 694 transitions. [2021-06-12 20:04:24,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:24,895 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:24,895 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:25,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4987 [2021-06-12 20:04:25,095 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:25,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:25,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1597134023, now seen corresponding path program 603 times [2021-06-12 20:04:25,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:25,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213247652] [2021-06-12 20:04:25,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:25,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:25,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213247652] [2021-06-12 20:04:25,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213247652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:25,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122664824] [2021-06-12 20:04:25,323 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 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 [2021-06-12 20:04:25,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:04:25,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:25,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 20:04:25,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:25,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122664824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:25,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:25,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:25,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478958074] [2021-06-12 20:04:25,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:25,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:25,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:25,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:25,782 INFO L87 Difference]: Start difference. First operand 310 states and 694 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:26,499 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-06-12 20:04:26,676 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-06-12 20:04:26,912 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-06-12 20:04:27,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:27,205 INFO L93 Difference]: Finished difference Result 406 states and 855 transitions. [2021-06-12 20:04:27,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:04:27,205 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:27,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:27,206 INFO L225 Difference]: With dead ends: 406 [2021-06-12 20:04:27,206 INFO L226 Difference]: Without dead ends: 380 [2021-06-12 20:04:27,206 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1579.1ms TimeCoverageRelationStatistics Valid=196, Invalid=1364, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:04:27,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-06-12 20:04:27,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 308. [2021-06-12 20:04:27,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.247557003257329) internal successors, (690), 307 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:27,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 690 transitions. [2021-06-12 20:04:27,208 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 690 transitions. Word has length 20 [2021-06-12 20:04:27,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:27,208 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 690 transitions. [2021-06-12 20:04:27,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:27,209 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 690 transitions. [2021-06-12 20:04:27,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:27,209 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:27,209 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:27,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4999,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:27,409 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:27,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:27,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1869588209, now seen corresponding path program 604 times [2021-06-12 20:04:27,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:27,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066703619] [2021-06-12 20:04:27,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:27,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:27,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066703619] [2021-06-12 20:04:27,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066703619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:27,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304954345] [2021-06-12 20:04:27,647 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 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 [2021-06-12 20:04:27,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:27,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:27,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:04:27,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:28,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304954345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:28,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:28,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:28,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822985853] [2021-06-12 20:04:28,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:28,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:28,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:28,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:28,169 INFO L87 Difference]: Start difference. First operand 308 states and 690 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:29,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:29,830 INFO L93 Difference]: Finished difference Result 393 states and 830 transitions. [2021-06-12 20:04:29,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:04:29,831 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:29,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:29,831 INFO L225 Difference]: With dead ends: 393 [2021-06-12 20:04:29,831 INFO L226 Difference]: Without dead ends: 372 [2021-06-12 20:04:29,831 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1909.2ms TimeCoverageRelationStatistics Valid=211, Invalid=1681, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:04:29,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-12 20:04:29,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 310. [2021-06-12 20:04:29,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.249190938511327) internal successors, (695), 309 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:29,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 695 transitions. [2021-06-12 20:04:29,834 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 695 transitions. Word has length 20 [2021-06-12 20:04:29,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:29,834 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 695 transitions. [2021-06-12 20:04:29,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:29,834 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 695 transitions. [2021-06-12 20:04:29,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:29,834 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:29,834 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:30,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 605 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5014 [2021-06-12 20:04:30,035 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:30,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:30,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1628643335, now seen corresponding path program 605 times [2021-06-12 20:04:30,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:30,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981766656] [2021-06-12 20:04:30,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:30,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:30,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981766656] [2021-06-12 20:04:30,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981766656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:30,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359603117] [2021-06-12 20:04:30,234 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 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 [2021-06-12 20:04:30,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:04:30,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:30,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:04:30,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:30,607 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:30,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359603117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:30,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:30,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:30,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073672340] [2021-06-12 20:04:30,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:30,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:30,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:30,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:30,608 INFO L87 Difference]: Start difference. First operand 310 states and 695 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:31,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:31,288 INFO L93 Difference]: Finished difference Result 373 states and 807 transitions. [2021-06-12 20:04:31,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:04:31,288 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:31,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:31,288 INFO L225 Difference]: With dead ends: 373 [2021-06-12 20:04:31,288 INFO L226 Difference]: Without dead ends: 354 [2021-06-12 20:04:31,288 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 831.9ms TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:04:31,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-12 20:04:31,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 310. [2021-06-12 20:04:31,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.249190938511327) internal successors, (695), 309 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:31,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 695 transitions. [2021-06-12 20:04:31,291 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 695 transitions. Word has length 20 [2021-06-12 20:04:31,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:31,291 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 695 transitions. [2021-06-12 20:04:31,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:31,291 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 695 transitions. [2021-06-12 20:04:31,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:31,291 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:31,291 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:31,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5028,606 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:31,492 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:31,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:31,492 INFO L82 PathProgramCache]: Analyzing trace with hash 386453271, now seen corresponding path program 606 times [2021-06-12 20:04:31,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:31,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495954272] [2021-06-12 20:04:31,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:31,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:31,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495954272] [2021-06-12 20:04:31,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495954272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:31,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042353114] [2021-06-12 20:04:31,761 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 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 [2021-06-12 20:04:31,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:04:31,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:31,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:04:31,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:32,115 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:04:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:32,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042353114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:32,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:32,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:32,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250984790] [2021-06-12 20:04:32,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:32,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:32,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:32,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:32,244 INFO L87 Difference]: Start difference. First operand 310 states and 695 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:33,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:33,011 INFO L93 Difference]: Finished difference Result 357 states and 778 transitions. [2021-06-12 20:04:33,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:04:33,011 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:33,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:33,012 INFO L225 Difference]: With dead ends: 357 [2021-06-12 20:04:33,012 INFO L226 Difference]: Without dead ends: 339 [2021-06-12 20:04:33,012 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1125.1ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:04:33,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-12 20:04:33,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 313. [2021-06-12 20:04:33,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.246794871794872) internal successors, (701), 312 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:33,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 701 transitions. [2021-06-12 20:04:33,014 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 701 transitions. Word has length 20 [2021-06-12 20:04:33,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:33,014 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 701 transitions. [2021-06-12 20:04:33,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:33,014 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 701 transitions. [2021-06-12 20:04:33,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:33,015 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:33,015 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:33,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5041 [2021-06-12 20:04:33,215 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:33,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:33,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1721044601, now seen corresponding path program 607 times [2021-06-12 20:04:33,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:33,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798840294] [2021-06-12 20:04:33,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:33,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:33,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798840294] [2021-06-12 20:04:33,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798840294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:33,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307367430] [2021-06-12 20:04:33,413 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 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 [2021-06-12 20:04:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:33,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:04:33,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:33,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307367430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:33,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:33,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:33,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707843737] [2021-06-12 20:04:33,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:33,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:33,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:33,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:33,964 INFO L87 Difference]: Start difference. First operand 313 states and 701 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:34,514 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-06-12 20:04:35,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:35,237 INFO L93 Difference]: Finished difference Result 383 states and 817 transitions. [2021-06-12 20:04:35,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:04:35,237 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:35,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:35,238 INFO L225 Difference]: With dead ends: 383 [2021-06-12 20:04:35,238 INFO L226 Difference]: Without dead ends: 359 [2021-06-12 20:04:35,238 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1570.2ms TimeCoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:04:35,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-12 20:04:35,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 314. [2021-06-12 20:04:35,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.2492012779552715) internal successors, (704), 313 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:35,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 704 transitions. [2021-06-12 20:04:35,240 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 704 transitions. Word has length 20 [2021-06-12 20:04:35,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:35,241 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 704 transitions. [2021-06-12 20:04:35,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:35,241 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 704 transitions. [2021-06-12 20:04:35,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:35,241 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:35,241 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:35,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 608 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5053 [2021-06-12 20:04:35,441 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:35,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:35,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1183189023, now seen corresponding path program 608 times [2021-06-12 20:04:35,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:35,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865463080] [2021-06-12 20:04:35,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:35,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:35,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865463080] [2021-06-12 20:04:35,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865463080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:35,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563437928] [2021-06-12 20:04:35,632 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 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 [2021-06-12 20:04:35,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:35,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:35,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:04:35,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:36,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563437928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:36,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:36,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:36,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490824819] [2021-06-12 20:04:36,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:36,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:36,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:36,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:36,064 INFO L87 Difference]: Start difference. First operand 314 states and 704 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:37,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:37,108 INFO L93 Difference]: Finished difference Result 398 states and 841 transitions. [2021-06-12 20:04:37,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:04:37,108 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:37,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:37,108 INFO L225 Difference]: With dead ends: 398 [2021-06-12 20:04:37,108 INFO L226 Difference]: Without dead ends: 376 [2021-06-12 20:04:37,109 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1242.3ms TimeCoverageRelationStatistics Valid=202, Invalid=1280, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:04:37,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-12 20:04:37,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 314. [2021-06-12 20:04:37,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.2492012779552715) internal successors, (704), 313 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:37,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 704 transitions. [2021-06-12 20:04:37,111 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 704 transitions. Word has length 20 [2021-06-12 20:04:37,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:37,111 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 704 transitions. [2021-06-12 20:04:37,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:37,111 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 704 transitions. [2021-06-12 20:04:37,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:37,112 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:37,112 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:37,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5063 [2021-06-12 20:04:37,312 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:37,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:37,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1689535289, now seen corresponding path program 609 times [2021-06-12 20:04:37,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:37,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584282523] [2021-06-12 20:04:37,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:37,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:37,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:37,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584282523] [2021-06-12 20:04:37,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584282523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:37,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802284725] [2021-06-12 20:04:37,497 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 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 [2021-06-12 20:04:37,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:04:37,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:37,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-12 20:04:37,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:37,957 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:37,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802284725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:37,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:37,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:37,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728638438] [2021-06-12 20:04:37,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:37,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:37,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:37,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:37,958 INFO L87 Difference]: Start difference. First operand 314 states and 704 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:38,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:38,726 INFO L93 Difference]: Finished difference Result 382 states and 826 transitions. [2021-06-12 20:04:38,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:04:38,727 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:38,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:38,727 INFO L225 Difference]: With dead ends: 382 [2021-06-12 20:04:38,727 INFO L226 Difference]: Without dead ends: 363 [2021-06-12 20:04:38,727 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 895.0ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:04:38,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-12 20:04:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 314. [2021-06-12 20:04:38,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.2492012779552715) internal successors, (704), 313 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 704 transitions. [2021-06-12 20:04:38,730 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 704 transitions. Word has length 20 [2021-06-12 20:04:38,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:38,730 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 704 transitions. [2021-06-12 20:04:38,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:38,730 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 704 transitions. [2021-06-12 20:04:38,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:38,730 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:38,730 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:38,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5075,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:38,931 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:38,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:38,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1230116495, now seen corresponding path program 610 times [2021-06-12 20:04:38,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:38,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113719000] [2021-06-12 20:04:38,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:39,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:39,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:39,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113719000] [2021-06-12 20:04:39,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113719000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:39,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824866510] [2021-06-12 20:04:39,191 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 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 [2021-06-12 20:04:39,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:39,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:39,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:04:39,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:39,491 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 20:04:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:39,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824866510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:39,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:39,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:39,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789988045] [2021-06-12 20:04:39,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:39,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:39,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:39,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:39,701 INFO L87 Difference]: Start difference. First operand 314 states and 704 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:40,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:40,078 INFO L93 Difference]: Finished difference Result 330 states and 727 transitions. [2021-06-12 20:04:40,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:04:40,078 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:40,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:40,078 INFO L225 Difference]: With dead ends: 330 [2021-06-12 20:04:40,078 INFO L226 Difference]: Without dead ends: 315 [2021-06-12 20:04:40,078 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 842.6ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:04:40,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-12 20:04:40,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2021-06-12 20:04:40,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.248407643312102) internal successors, (706), 314 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:40,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 706 transitions. [2021-06-12 20:04:40,081 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 706 transitions. Word has length 20 [2021-06-12 20:04:40,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:40,081 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 706 transitions. [2021-06-12 20:04:40,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 706 transitions. [2021-06-12 20:04:40,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:40,081 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:40,081 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:40,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 611 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5088 [2021-06-12 20:04:40,282 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:40,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:40,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1411897427, now seen corresponding path program 611 times [2021-06-12 20:04:40,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:40,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105354821] [2021-06-12 20:04:40,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:40,522 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:40,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:40,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105354821] [2021-06-12 20:04:40,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105354821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:40,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322938808] [2021-06-12 20:04:40,522 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 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 [2021-06-12 20:04:40,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:04:40,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:40,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:04:40,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:40,825 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 20:04:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:41,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322938808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:41,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:41,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:41,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207441716] [2021-06-12 20:04:41,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:41,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:41,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:41,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:41,046 INFO L87 Difference]: Start difference. First operand 315 states and 706 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:41,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:41,435 INFO L93 Difference]: Finished difference Result 329 states and 726 transitions. [2021-06-12 20:04:41,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:04:41,435 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:41,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:41,435 INFO L225 Difference]: With dead ends: 329 [2021-06-12 20:04:41,435 INFO L226 Difference]: Without dead ends: 316 [2021-06-12 20:04:41,436 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 814.3ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:04:41,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-12 20:04:41,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2021-06-12 20:04:41,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.2476190476190476) internal successors, (708), 315 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:41,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 708 transitions. [2021-06-12 20:04:41,438 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 708 transitions. Word has length 20 [2021-06-12 20:04:41,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:41,438 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 708 transitions. [2021-06-12 20:04:41,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:41,438 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 708 transitions. [2021-06-12 20:04:41,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:41,438 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:41,438 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:41,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5100 [2021-06-12 20:04:41,653 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:41,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:41,653 INFO L82 PathProgramCache]: Analyzing trace with hash -165444303, now seen corresponding path program 612 times [2021-06-12 20:04:41,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:41,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54046088] [2021-06-12 20:04:41,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:41,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:41,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54046088] [2021-06-12 20:04:41,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54046088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:41,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702286217] [2021-06-12 20:04:41,944 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 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 [2021-06-12 20:04:41,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:04:41,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:41,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:04:41,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:42,242 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 20:04:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:42,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702286217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:42,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:42,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:42,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323711156] [2021-06-12 20:04:42,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:42,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:42,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:42,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:42,489 INFO L87 Difference]: Start difference. First operand 316 states and 708 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:43,234 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-12 20:04:43,465 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2021-06-12 20:04:43,624 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2021-06-12 20:04:43,892 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 76 [2021-06-12 20:04:44,181 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2021-06-12 20:04:44,335 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-06-12 20:04:44,465 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-06-12 20:04:44,680 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2021-06-12 20:04:44,903 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2021-06-12 20:04:45,104 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-06-12 20:04:45,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:45,149 INFO L93 Difference]: Finished difference Result 404 states and 851 transitions. [2021-06-12 20:04:45,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:04:45,149 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:45,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:45,149 INFO L225 Difference]: With dead ends: 404 [2021-06-12 20:04:45,149 INFO L226 Difference]: Without dead ends: 379 [2021-06-12 20:04:45,149 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 2951.7ms TimeCoverageRelationStatistics Valid=298, Invalid=1864, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:04:45,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-12 20:04:45,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 314. [2021-06-12 20:04:45,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.2492012779552715) internal successors, (704), 313 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:45,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 704 transitions. [2021-06-12 20:04:45,152 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 704 transitions. Word has length 20 [2021-06-12 20:04:45,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:45,152 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 704 transitions. [2021-06-12 20:04:45,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:45,152 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 704 transitions. [2021-06-12 20:04:45,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:45,153 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:45,153 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:45,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 613 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5112 [2021-06-12 20:04:45,353 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:45,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:45,353 INFO L82 PathProgramCache]: Analyzing trace with hash -71237511, now seen corresponding path program 613 times [2021-06-12 20:04:45,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:45,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543282589] [2021-06-12 20:04:45,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:45,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:45,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543282589] [2021-06-12 20:04:45,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543282589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:45,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870914023] [2021-06-12 20:04:45,578 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 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 [2021-06-12 20:04:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:45,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:04:45,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:45,955 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-12 20:04:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:46,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870914023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:46,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:46,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:46,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542916776] [2021-06-12 20:04:46,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:46,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:46,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:46,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:46,135 INFO L87 Difference]: Start difference. First operand 314 states and 704 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:46,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:46,546 INFO L93 Difference]: Finished difference Result 330 states and 728 transitions. [2021-06-12 20:04:46,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:04:46,546 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:46,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:46,547 INFO L225 Difference]: With dead ends: 330 [2021-06-12 20:04:46,547 INFO L226 Difference]: Without dead ends: 317 [2021-06-12 20:04:46,547 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 893.6ms TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:04:46,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-12 20:04:46,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 316. [2021-06-12 20:04:46,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.2476190476190476) internal successors, (708), 315 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:46,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 708 transitions. [2021-06-12 20:04:46,549 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 708 transitions. Word has length 20 [2021-06-12 20:04:46,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:46,549 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 708 transitions. [2021-06-12 20:04:46,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:46,549 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 708 transitions. [2021-06-12 20:04:46,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:46,550 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:46,550 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:46,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5124,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:46,750 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:46,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:46,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1648579241, now seen corresponding path program 614 times [2021-06-12 20:04:46,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:46,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783181788] [2021-06-12 20:04:46,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:46,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:46,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783181788] [2021-06-12 20:04:46,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783181788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:46,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255645438] [2021-06-12 20:04:46,999 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 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 [2021-06-12 20:04:47,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:47,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:47,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:04:47,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:47,322 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:04:47,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:47,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255645438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:47,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:47,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:47,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276735449] [2021-06-12 20:04:47,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:47,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:47,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:47,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:47,511 INFO L87 Difference]: Start difference. First operand 316 states and 708 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:48,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:48,727 INFO L93 Difference]: Finished difference Result 381 states and 826 transitions. [2021-06-12 20:04:48,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:04:48,728 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:48,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:48,728 INFO L225 Difference]: With dead ends: 381 [2021-06-12 20:04:48,728 INFO L226 Difference]: Without dead ends: 357 [2021-06-12 20:04:48,728 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1562.1ms TimeCoverageRelationStatistics Valid=203, Invalid=1279, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:04:48,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-12 20:04:48,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 318. [2021-06-12 20:04:48,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.2523659305993693) internal successors, (714), 317 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) [2021-06-12 20:04:48,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 714 transitions. [2021-06-12 20:04:48,731 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 714 transitions. Word has length 20 [2021-06-12 20:04:48,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:48,731 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 714 transitions. [2021-06-12 20:04:48,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:48,731 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 714 transitions. [2021-06-12 20:04:48,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:48,731 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:48,731 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:48,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5135 [2021-06-12 20:04:48,932 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:48,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:48,932 INFO L82 PathProgramCache]: Analyzing trace with hash -313987911, now seen corresponding path program 615 times [2021-06-12 20:04:48,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:48,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23965400] [2021-06-12 20:04:48,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:48,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:49,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:49,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:49,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23965400] [2021-06-12 20:04:49,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23965400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:49,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346953924] [2021-06-12 20:04:49,198 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 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 [2021-06-12 20:04:49,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:04:49,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:49,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:04:49,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:49,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346953924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:49,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:49,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:49,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309589247] [2021-06-12 20:04:49,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:49,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:49,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:49,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:49,634 INFO L87 Difference]: Start difference. First operand 318 states and 714 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:51,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:51,032 INFO L93 Difference]: Finished difference Result 384 states and 823 transitions. [2021-06-12 20:04:51,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:04:51,032 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:51,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:51,032 INFO L225 Difference]: With dead ends: 384 [2021-06-12 20:04:51,032 INFO L226 Difference]: Without dead ends: 352 [2021-06-12 20:04:51,033 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1668.8ms TimeCoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:04:51,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-06-12 20:04:51,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 322. [2021-06-12 20:04:51,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.2585669781931466) internal successors, (725), 321 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:51,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 725 transitions. [2021-06-12 20:04:51,035 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 725 transitions. Word has length 20 [2021-06-12 20:04:51,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:51,035 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 725 transitions. [2021-06-12 20:04:51,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:51,035 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 725 transitions. [2021-06-12 20:04:51,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:51,036 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:51,036 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:51,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5147,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:51,236 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:51,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:51,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1142232975, now seen corresponding path program 616 times [2021-06-12 20:04:51,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:51,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443632790] [2021-06-12 20:04:51,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:51,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:51,471 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:51,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:51,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443632790] [2021-06-12 20:04:51,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443632790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:51,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334106516] [2021-06-12 20:04:51,472 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 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 [2021-06-12 20:04:51,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:51,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:51,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:04:51,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:51,830 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:04:51,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:51,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334106516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:51,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:51,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:51,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826913233] [2021-06-12 20:04:51,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:51,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:51,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:51,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:51,951 INFO L87 Difference]: Start difference. First operand 322 states and 725 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:52,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:52,840 INFO L93 Difference]: Finished difference Result 376 states and 818 transitions. [2021-06-12 20:04:52,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:04:52,840 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:52,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:52,840 INFO L225 Difference]: With dead ends: 376 [2021-06-12 20:04:52,840 INFO L226 Difference]: Without dead ends: 351 [2021-06-12 20:04:52,841 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1194.6ms TimeCoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:04:52,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-06-12 20:04:52,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 323. [2021-06-12 20:04:52,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.2577639751552794) internal successors, (727), 322 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:52,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 727 transitions. [2021-06-12 20:04:52,843 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 727 transitions. Word has length 20 [2021-06-12 20:04:52,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:52,843 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 727 transitions. [2021-06-12 20:04:52,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:52,843 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 727 transitions. [2021-06-12 20:04:52,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:52,843 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:52,844 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:53,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5159,617 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:53,044 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:53,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:53,044 INFO L82 PathProgramCache]: Analyzing trace with hash -345497223, now seen corresponding path program 617 times [2021-06-12 20:04:53,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:53,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472137177] [2021-06-12 20:04:53,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:53,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:53,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472137177] [2021-06-12 20:04:53,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472137177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:53,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771212147] [2021-06-12 20:04:53,264 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 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 [2021-06-12 20:04:53,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:04:53,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:53,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:04:53,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:53,655 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:53,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771212147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:53,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:53,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:53,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931284952] [2021-06-12 20:04:53,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:53,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:53,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:53,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:53,656 INFO L87 Difference]: Start difference. First operand 323 states and 727 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:54,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:54,529 INFO L93 Difference]: Finished difference Result 393 states and 843 transitions. [2021-06-12 20:04:54,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:04:54,529 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:54,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:54,530 INFO L225 Difference]: With dead ends: 393 [2021-06-12 20:04:54,530 INFO L226 Difference]: Without dead ends: 371 [2021-06-12 20:04:54,530 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1028.1ms TimeCoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:04:54,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-12 20:04:54,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 322. [2021-06-12 20:04:54,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.2585669781931466) internal successors, (725), 321 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:54,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 725 transitions. [2021-06-12 20:04:54,532 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 725 transitions. Word has length 20 [2021-06-12 20:04:54,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:54,532 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 725 transitions. [2021-06-12 20:04:54,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:54,533 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 725 transitions. [2021-06-12 20:04:54,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:54,533 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:54,533 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:54,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5171,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:54,733 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:54,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:54,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1196219667, now seen corresponding path program 618 times [2021-06-12 20:04:54,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:54,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108247668] [2021-06-12 20:04:54,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:54,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:54,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108247668] [2021-06-12 20:04:54,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108247668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:54,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713103208] [2021-06-12 20:04:54,964 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 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 [2021-06-12 20:04:54,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:04:54,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:54,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:04:54,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:55,339 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:04:55,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:55,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713103208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:55,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:55,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:55,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217469366] [2021-06-12 20:04:55,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:55,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:55,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:55,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:55,509 INFO L87 Difference]: Start difference. First operand 322 states and 725 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:55,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:55,847 INFO L93 Difference]: Finished difference Result 338 states and 749 transitions. [2021-06-12 20:04:55,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:04:55,848 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:55,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:55,848 INFO L225 Difference]: With dead ends: 338 [2021-06-12 20:04:55,848 INFO L226 Difference]: Without dead ends: 325 [2021-06-12 20:04:55,848 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 781.6ms TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:04:55,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-06-12 20:04:55,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2021-06-12 20:04:55,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.256172839506173) internal successors, (731), 324 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:55,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 731 transitions. [2021-06-12 20:04:55,851 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 731 transitions. Word has length 20 [2021-06-12 20:04:55,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:55,851 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 731 transitions. [2021-06-12 20:04:55,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:55,851 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 731 transitions. [2021-06-12 20:04:55,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:55,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:55,851 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:56,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5183 [2021-06-12 20:04:56,051 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:56,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:56,052 INFO L82 PathProgramCache]: Analyzing trace with hash -381122063, now seen corresponding path program 619 times [2021-06-12 20:04:56,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:56,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851134779] [2021-06-12 20:04:56,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:56,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:56,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851134779] [2021-06-12 20:04:56,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851134779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:56,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121831450] [2021-06-12 20:04:56,273 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 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 [2021-06-12 20:04:56,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:56,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:04:56,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:56,599 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:04:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:56,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121831450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:56,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:56,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:56,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706268289] [2021-06-12 20:04:56,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:56,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:56,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:56,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:56,777 INFO L87 Difference]: Start difference. First operand 325 states and 731 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:58,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:58,128 INFO L93 Difference]: Finished difference Result 415 states and 880 transitions. [2021-06-12 20:04:58,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:04:58,128 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:58,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:58,129 INFO L225 Difference]: With dead ends: 415 [2021-06-12 20:04:58,129 INFO L226 Difference]: Without dead ends: 390 [2021-06-12 20:04:58,129 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1671.2ms TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:04:58,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-12 20:04:58,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 325. [2021-06-12 20:04:58,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.256172839506173) internal successors, (731), 324 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:58,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 731 transitions. [2021-06-12 20:04:58,131 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 731 transitions. Word has length 20 [2021-06-12 20:04:58,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:58,131 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 731 transitions. [2021-06-12 20:04:58,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:58,131 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 731 transitions. [2021-06-12 20:04:58,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:58,132 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:58,132 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:58,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5195,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:58,332 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:58,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:58,332 INFO L82 PathProgramCache]: Analyzing trace with hash 125224203, now seen corresponding path program 620 times [2021-06-12 20:04:58,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:58,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610748061] [2021-06-12 20:04:58,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:58,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:58,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:58,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610748061] [2021-06-12 20:04:58,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610748061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:58,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924657192] [2021-06-12 20:04:58,570 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 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 [2021-06-12 20:04:58,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:58,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:58,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:04:58,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:58,920 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:04:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:59,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924657192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:59,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:59,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:04:59,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061623086] [2021-06-12 20:04:59,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:04:59,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:59,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:04:59,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:59,046 INFO L87 Difference]: Start difference. First operand 325 states and 731 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:59,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:59,858 INFO L93 Difference]: Finished difference Result 378 states and 811 transitions. [2021-06-12 20:04:59,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:04:59,858 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:04:59,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:59,858 INFO L225 Difference]: With dead ends: 378 [2021-06-12 20:04:59,858 INFO L226 Difference]: Without dead ends: 346 [2021-06-12 20:04:59,858 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1128.9ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:04:59,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-12 20:04:59,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 326. [2021-06-12 20:04:59,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.2553846153846155) internal successors, (733), 325 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:59,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 733 transitions. [2021-06-12 20:04:59,861 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 733 transitions. Word has length 20 [2021-06-12 20:04:59,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:59,861 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 733 transitions. [2021-06-12 20:04:59,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:59,861 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 733 transitions. [2021-06-12 20:04:59,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:04:59,861 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:59,861 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:00,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5207,621 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:00,062 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:00,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:00,062 INFO L82 PathProgramCache]: Analyzing trace with hash 921959955, now seen corresponding path program 621 times [2021-06-12 20:05:00,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:00,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779763780] [2021-06-12 20:05:00,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:00,297 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:00,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:00,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779763780] [2021-06-12 20:05:00,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779763780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:00,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461566938] [2021-06-12 20:05:00,298 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 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 [2021-06-12 20:05:00,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:05:00,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:00,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 20:05:00,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:00,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461566938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:00,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:00,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:05:00,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342035642] [2021-06-12 20:05:00,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:05:00,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:00,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:05:00,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:00,729 INFO L87 Difference]: Start difference. First operand 326 states and 733 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:01,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:01,771 INFO L93 Difference]: Finished difference Result 414 states and 889 transitions. [2021-06-12 20:05:01,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:05:01,771 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:05:01,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:01,772 INFO L225 Difference]: With dead ends: 414 [2021-06-12 20:05:01,772 INFO L226 Difference]: Without dead ends: 400 [2021-06-12 20:05:01,772 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1216.9ms TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:05:01,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-12 20:05:01,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 328. [2021-06-12 20:05:01,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.2629969418960245) internal successors, (740), 327 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:01,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 740 transitions. [2021-06-12 20:05:01,775 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 740 transitions. Word has length 20 [2021-06-12 20:05:01,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:01,775 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 740 transitions. [2021-06-12 20:05:01,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:01,775 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 740 transitions. [2021-06-12 20:05:01,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:05:01,775 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:01,775 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:01,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5219,622 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:01,976 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:01,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:01,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1357910735, now seen corresponding path program 622 times [2021-06-12 20:05:01,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:01,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641324893] [2021-06-12 20:05:01,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:02,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:02,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641324893] [2021-06-12 20:05:02,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641324893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:02,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759785878] [2021-06-12 20:05:02,181 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 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 [2021-06-12 20:05:02,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:02,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:02,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:05:02,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:02,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759785878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:02,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:02,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:05:02,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540922542] [2021-06-12 20:05:02,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:05:02,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:02,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:05:02,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:02,602 INFO L87 Difference]: Start difference. First operand 328 states and 740 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:03,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:03,750 INFO L93 Difference]: Finished difference Result 380 states and 831 transitions. [2021-06-12 20:05:03,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:05:03,750 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:05:03,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:03,751 INFO L225 Difference]: With dead ends: 380 [2021-06-12 20:05:03,751 INFO L226 Difference]: Without dead ends: 359 [2021-06-12 20:05:03,751 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1333.4ms TimeCoverageRelationStatistics Valid=200, Invalid=1440, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:05:03,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-12 20:05:03,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 330. [2021-06-12 20:05:03,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2613981762917934) internal successors, (744), 329 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:03,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 744 transitions. [2021-06-12 20:05:03,753 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 744 transitions. Word has length 20 [2021-06-12 20:05:03,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:03,754 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 744 transitions. [2021-06-12 20:05:03,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:03,754 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 744 transitions. [2021-06-12 20:05:03,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:05:03,754 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:03,754 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:03,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5231 [2021-06-12 20:05:03,954 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:03,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:03,955 INFO L82 PathProgramCache]: Analyzing trace with hash -561174983, now seen corresponding path program 623 times [2021-06-12 20:05:03,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:03,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814355131] [2021-06-12 20:05:03,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:04,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:04,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814355131] [2021-06-12 20:05:04,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814355131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:04,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206621734] [2021-06-12 20:05:04,156 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 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 [2021-06-12 20:05:04,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:05:04,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:04,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:05:04,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:04,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206621734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:04,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:04,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:05:04,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021067265] [2021-06-12 20:05:04,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:05:04,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:04,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:05:04,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:04,673 INFO L87 Difference]: Start difference. First operand 330 states and 744 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:06,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:06,011 INFO L93 Difference]: Finished difference Result 412 states and 877 transitions. [2021-06-12 20:05:06,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:05:06,011 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:05:06,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:06,012 INFO L225 Difference]: With dead ends: 412 [2021-06-12 20:05:06,012 INFO L226 Difference]: Without dead ends: 390 [2021-06-12 20:05:06,012 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1567.9ms TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:05:06,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-12 20:05:06,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 330. [2021-06-12 20:05:06,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2613981762917934) internal successors, (744), 329 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:06,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 744 transitions. [2021-06-12 20:05:06,015 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 744 transitions. Word has length 20 [2021-06-12 20:05:06,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:06,015 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 744 transitions. [2021-06-12 20:05:06,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:06,015 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 744 transitions. [2021-06-12 20:05:06,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:05:06,015 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:06,015 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:06,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5246,624 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:06,216 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:06,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:06,216 INFO L82 PathProgramCache]: Analyzing trace with hash -54828717, now seen corresponding path program 624 times [2021-06-12 20:05:06,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:06,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584995779] [2021-06-12 20:05:06,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:06,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:06,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:06,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584995779] [2021-06-12 20:05:06,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584995779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:06,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14603659] [2021-06-12 20:05:06,401 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 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 [2021-06-12 20:05:06,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:05:06,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:06,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:05:06,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:06,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14603659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:06,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:06,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:05:06,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250511896] [2021-06-12 20:05:06,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:05:06,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:06,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:05:06,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:06,836 INFO L87 Difference]: Start difference. First operand 330 states and 744 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:07,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:07,543 INFO L93 Difference]: Finished difference Result 397 states and 864 transitions. [2021-06-12 20:05:07,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:05:07,544 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:05:07,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:07,544 INFO L225 Difference]: With dead ends: 397 [2021-06-12 20:05:07,544 INFO L226 Difference]: Without dead ends: 378 [2021-06-12 20:05:07,544 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 815.1ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:05:07,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-12 20:05:07,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 330. [2021-06-12 20:05:07,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2613981762917934) internal successors, (744), 329 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:07,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 744 transitions. [2021-06-12 20:05:07,547 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 744 transitions. Word has length 20 [2021-06-12 20:05:07,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:07,547 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 744 transitions. [2021-06-12 20:05:07,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:07,547 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 744 transitions. [2021-06-12 20:05:07,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:05:07,547 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:07,547 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:07,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5259,625 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:07,748 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:07,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:07,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1832686521, now seen corresponding path program 625 times [2021-06-12 20:05:07,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:07,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842566552] [2021-06-12 20:05:07,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:08,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:08,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842566552] [2021-06-12 20:05:08,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842566552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:08,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638163885] [2021-06-12 20:05:08,013 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 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 [2021-06-12 20:05:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:08,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:05:08,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:08,606 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:08,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638163885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:08,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:08,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:05:08,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836531419] [2021-06-12 20:05:08,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:05:08,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:08,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:05:08,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:08,607 INFO L87 Difference]: Start difference. First operand 330 states and 744 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:08,862 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-12 20:05:09,032 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2021-06-12 20:05:09,189 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2021-06-12 20:05:09,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:09,397 INFO L93 Difference]: Finished difference Result 355 states and 781 transitions. [2021-06-12 20:05:09,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:05:09,397 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:05:09,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:09,398 INFO L225 Difference]: With dead ends: 355 [2021-06-12 20:05:09,398 INFO L226 Difference]: Without dead ends: 348 [2021-06-12 20:05:09,398 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1206.1ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:05:09,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-12 20:05:09,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 331. [2021-06-12 20:05:09,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.2636363636363637) internal successors, (747), 330 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:09,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 747 transitions. [2021-06-12 20:05:09,401 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 747 transitions. Word has length 20 [2021-06-12 20:05:09,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:09,401 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 747 transitions. [2021-06-12 20:05:09,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:09,401 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 747 transitions. [2021-06-12 20:05:09,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:05:09,401 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:09,401 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:09,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 626 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5271 [2021-06-12 20:05:09,601 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:09,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:09,602 INFO L82 PathProgramCache]: Analyzing trace with hash 255344791, now seen corresponding path program 626 times [2021-06-12 20:05:09,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:09,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402983107] [2021-06-12 20:05:09,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:09,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:09,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402983107] [2021-06-12 20:05:09,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402983107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:09,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456065936] [2021-06-12 20:05:09,857 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 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 [2021-06-12 20:05:09,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:09,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:09,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:05:09,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:10,186 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:05:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:10,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456065936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:10,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:10,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:05:10,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536369652] [2021-06-12 20:05:10,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:05:10,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:10,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:05:10,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:10,375 INFO L87 Difference]: Start difference. First operand 331 states and 747 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:11,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:11,416 INFO L93 Difference]: Finished difference Result 382 states and 824 transitions. [2021-06-12 20:05:11,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:05:11,416 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:05:11,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:11,417 INFO L225 Difference]: With dead ends: 382 [2021-06-12 20:05:11,417 INFO L226 Difference]: Without dead ends: 351 [2021-06-12 20:05:11,417 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1367.1ms TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:05:11,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-06-12 20:05:11,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 330. [2021-06-12 20:05:11,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2613981762917934) internal successors, (744), 329 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:11,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 744 transitions. [2021-06-12 20:05:11,419 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 744 transitions. Word has length 20 [2021-06-12 20:05:11,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:11,419 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 744 transitions. [2021-06-12 20:05:11,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:11,419 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 744 transitions. [2021-06-12 20:05:11,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:05:11,420 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:11,420 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:11,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5285,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:11,620 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:11,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:11,620 INFO L82 PathProgramCache]: Analyzing trace with hash 761691057, now seen corresponding path program 627 times [2021-06-12 20:05:11,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:11,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921900065] [2021-06-12 20:05:11,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:11,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:11,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921900065] [2021-06-12 20:05:11,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921900065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:11,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104185199] [2021-06-12 20:05:11,880 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 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 [2021-06-12 20:05:11,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:05:11,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:11,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:05:11,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:12,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104185199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:12,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:12,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:05:12,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352494715] [2021-06-12 20:05:12,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:05:12,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:12,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:05:12,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:12,302 INFO L87 Difference]: Start difference. First operand 330 states and 744 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:13,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:13,537 INFO L93 Difference]: Finished difference Result 392 states and 842 transitions. [2021-06-12 20:05:13,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:05:13,538 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:05:13,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:13,538 INFO L225 Difference]: With dead ends: 392 [2021-06-12 20:05:13,538 INFO L226 Difference]: Without dead ends: 371 [2021-06-12 20:05:13,538 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1500.0ms TimeCoverageRelationStatistics Valid=195, Invalid=1527, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:05:13,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-12 20:05:13,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 330. [2021-06-12 20:05:13,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2613981762917934) internal successors, (744), 329 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:13,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 744 transitions. [2021-06-12 20:05:13,541 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 744 transitions. Word has length 20 [2021-06-12 20:05:13,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:13,541 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 744 transitions. [2021-06-12 20:05:13,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:13,541 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 744 transitions. [2021-06-12 20:05:13,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:05:13,541 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:13,541 INFO L472 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:13,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 628 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5297 [2021-06-12 20:05:13,742 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:13,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:13,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1366393994, now seen corresponding path program 628 times [2021-06-12 20:05:13,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:13,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012195511] [2021-06-12 20:05:13,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:05:13,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:13,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012195511] [2021-06-12 20:05:13,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012195511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:13,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600235191] [2021-06-12 20:05:13,860 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 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 [2021-06-12 20:05:13,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:13,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:13,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:05:13,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:05:14,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600235191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:14,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:14,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:05:14,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043024347] [2021-06-12 20:05:14,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:05:14,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:14,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:05:14,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:05:14,110 INFO L87 Difference]: Start difference. First operand 330 states and 744 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) [2021-06-12 20:05:14,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:14,606 INFO L93 Difference]: Finished difference Result 383 states and 848 transitions. [2021-06-12 20:05:14,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:05:14,606 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 20 [2021-06-12 20:05:14,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:14,606 INFO L225 Difference]: With dead ends: 383 [2021-06-12 20:05:14,607 INFO L226 Difference]: Without dead ends: 381 [2021-06-12 20:05:14,607 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 598.1ms TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:05:14,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-12 20:05:14,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 330. [2021-06-12 20:05:14,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2583586626139818) internal successors, (743), 329 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:14,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 743 transitions. [2021-06-12 20:05:14,609 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 743 transitions. Word has length 20 [2021-06-12 20:05:14,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:14,609 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 743 transitions. [2021-06-12 20:05:14,609 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) [2021-06-12 20:05:14,609 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 743 transitions. [2021-06-12 20:05:14,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:05:14,610 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:14,610 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:14,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5312,629 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:14,810 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:14,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:14,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1558426809, now seen corresponding path program 629 times [2021-06-12 20:05:14,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:14,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861015088] [2021-06-12 20:05:14,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:15,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:15,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861015088] [2021-06-12 20:05:15,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861015088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:15,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38792118] [2021-06-12 20:05:15,010 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 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 [2021-06-12 20:05:15,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:05:15,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:15,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:05:15,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:15,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38792118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:15,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:15,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:05:15,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640618813] [2021-06-12 20:05:15,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:05:15,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:15,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:05:15,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:15,441 INFO L87 Difference]: Start difference. First operand 330 states and 743 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:16,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:16,504 INFO L93 Difference]: Finished difference Result 412 states and 885 transitions. [2021-06-12 20:05:16,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:05:16,504 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:05:16,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:16,504 INFO L225 Difference]: With dead ends: 412 [2021-06-12 20:05:16,504 INFO L226 Difference]: Without dead ends: 393 [2021-06-12 20:05:16,505 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1267.8ms TimeCoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:05:16,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-12 20:05:16,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 335. [2021-06-12 20:05:16,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.2574850299401197) internal successors, (754), 334 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:16,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 754 transitions. [2021-06-12 20:05:16,507 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 754 transitions. Word has length 20 [2021-06-12 20:05:16,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:16,507 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 754 transitions. [2021-06-12 20:05:16,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:16,507 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 754 transitions. [2021-06-12 20:05:16,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:05:16,508 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:16,508 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:16,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 630 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5321 [2021-06-12 20:05:16,708 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:16,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:16,708 INFO L82 PathProgramCache]: Analyzing trace with hash -721443881, now seen corresponding path program 630 times [2021-06-12 20:05:16,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:16,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963951874] [2021-06-12 20:05:16,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:16,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:16,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:16,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963951874] [2021-06-12 20:05:16,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963951874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:16,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964633108] [2021-06-12 20:05:16,964 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 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 [2021-06-12 20:05:16,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:05:16,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:16,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:05:16,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:17,313 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:05:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:17,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964633108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:17,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:17,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:05:17,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810858869] [2021-06-12 20:05:17,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:05:17,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:17,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:05:17,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:17,439 INFO L87 Difference]: Start difference. First operand 335 states and 754 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:18,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:18,187 INFO L93 Difference]: Finished difference Result 382 states and 828 transitions. [2021-06-12 20:05:18,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:05:18,188 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:05:18,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:18,188 INFO L225 Difference]: With dead ends: 382 [2021-06-12 20:05:18,188 INFO L226 Difference]: Without dead ends: 357 [2021-06-12 20:05:18,189 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1088.8ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:05:18,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-12 20:05:18,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 337. [2021-06-12 20:05:18,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.255952380952381) internal successors, (758), 336 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 758 transitions. [2021-06-12 20:05:18,191 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 758 transitions. Word has length 20 [2021-06-12 20:05:18,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:18,192 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 758 transitions. [2021-06-12 20:05:18,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:18,192 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 758 transitions. [2021-06-12 20:05:18,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:05:18,192 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:18,192 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:18,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5333 [2021-06-12 20:05:18,393 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:18,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:18,393 INFO L82 PathProgramCache]: Analyzing trace with hash 75291871, now seen corresponding path program 631 times [2021-06-12 20:05:18,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:18,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334399123] [2021-06-12 20:05:18,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:18,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:18,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:18,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334399123] [2021-06-12 20:05:18,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334399123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:18,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190962531] [2021-06-12 20:05:18,585 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 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 [2021-06-12 20:05:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:18,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:05:18,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:19,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190962531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:19,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:19,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:05:19,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860325532] [2021-06-12 20:05:19,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:05:19,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:19,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:05:19,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:19,017 INFO L87 Difference]: Start difference. First operand 337 states and 758 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:19,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:19,722 INFO L93 Difference]: Finished difference Result 397 states and 864 transitions. [2021-06-12 20:05:19,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:05:19,722 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:05:19,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:19,723 INFO L225 Difference]: With dead ends: 397 [2021-06-12 20:05:19,723 INFO L226 Difference]: Without dead ends: 378 [2021-06-12 20:05:19,723 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 911.7ms TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:05:19,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-12 20:05:19,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 337. [2021-06-12 20:05:19,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.255952380952381) internal successors, (758), 336 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:19,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 758 transitions. [2021-06-12 20:05:19,726 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 758 transitions. Word has length 20 [2021-06-12 20:05:19,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:19,726 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 758 transitions. [2021-06-12 20:05:19,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:19,726 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 758 transitions. [2021-06-12 20:05:19,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:05:19,726 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:19,726 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:19,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5345,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:19,927 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:19,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:19,927 INFO L82 PathProgramCache]: Analyzing trace with hash 581638137, now seen corresponding path program 632 times [2021-06-12 20:05:19,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:19,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183987835] [2021-06-12 20:05:19,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:20,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:20,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183987835] [2021-06-12 20:05:20,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183987835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:20,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054440664] [2021-06-12 20:05:20,153 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 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 [2021-06-12 20:05:20,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:20,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:20,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:05:20,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:20,610 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:20,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054440664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:20,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:20,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:05:20,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52532556] [2021-06-12 20:05:20,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:05:20,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:20,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:05:20,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:20,611 INFO L87 Difference]: Start difference. First operand 337 states and 758 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:21,038 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-12 20:05:21,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:21,264 INFO L93 Difference]: Finished difference Result 404 states and 878 transitions. [2021-06-12 20:05:21,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:05:21,264 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:05:21,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:21,265 INFO L225 Difference]: With dead ends: 404 [2021-06-12 20:05:21,265 INFO L226 Difference]: Without dead ends: 385 [2021-06-12 20:05:21,265 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 961.5ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:05:21,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-06-12 20:05:21,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 337. [2021-06-12 20:05:21,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.255952380952381) internal successors, (758), 336 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:21,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 758 transitions. [2021-06-12 20:05:21,268 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 758 transitions. Word has length 20 [2021-06-12 20:05:21,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:21,268 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 758 transitions. [2021-06-12 20:05:21,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:21,268 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 758 transitions. [2021-06-12 20:05:21,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:05:21,268 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:21,268 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:21,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5357,633 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:21,469 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:21,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:21,469 INFO L82 PathProgramCache]: Analyzing trace with hash 546013297, now seen corresponding path program 633 times [2021-06-12 20:05:21,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:21,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058071802] [2021-06-12 20:05:21,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:21,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:21,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058071802] [2021-06-12 20:05:21,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058071802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:21,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389015561] [2021-06-12 20:05:21,668 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 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 [2021-06-12 20:05:21,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:05:21,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:21,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 20:05:21,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:22,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389015561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:22,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:22,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:05:22,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202896667] [2021-06-12 20:05:22,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:05:22,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:22,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:05:22,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:22,082 INFO L87 Difference]: Start difference. First operand 337 states and 758 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:22,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:22,871 INFO L93 Difference]: Finished difference Result 391 states and 851 transitions. [2021-06-12 20:05:22,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:05:22,872 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:05:22,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:22,872 INFO L225 Difference]: With dead ends: 391 [2021-06-12 20:05:22,872 INFO L226 Difference]: Without dead ends: 366 [2021-06-12 20:05:22,873 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1055.7ms TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:05:22,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-12 20:05:22,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 340. [2021-06-12 20:05:22,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.253687315634218) internal successors, (764), 339 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:22,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 764 transitions. [2021-06-12 20:05:22,876 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 764 transitions. Word has length 20 [2021-06-12 20:05:22,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:22,877 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 764 transitions. [2021-06-12 20:05:22,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:22,877 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 764 transitions. [2021-06-12 20:05:22,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:05:22,877 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:22,877 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:23,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5369,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:23,089 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:23,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:23,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1342749049, now seen corresponding path program 634 times [2021-06-12 20:05:23,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:23,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410253718] [2021-06-12 20:05:23,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:23,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:23,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410253718] [2021-06-12 20:05:23,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410253718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:23,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065435671] [2021-06-12 20:05:23,286 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 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 [2021-06-12 20:05:23,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:23,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:23,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:05:23,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:23,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:23,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065435671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:23,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:23,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:05:23,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365209593] [2021-06-12 20:05:23,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:05:23,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:23,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:05:23,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:23,717 INFO L87 Difference]: Start difference. First operand 340 states and 764 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:24,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:24,384 INFO L93 Difference]: Finished difference Result 400 states and 870 transitions. [2021-06-12 20:05:24,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:05:24,384 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:05:24,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:24,384 INFO L225 Difference]: With dead ends: 400 [2021-06-12 20:05:24,384 INFO L226 Difference]: Without dead ends: 381 [2021-06-12 20:05:24,385 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 859.9ms TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:05:24,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-12 20:05:24,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 339. [2021-06-12 20:05:24,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.2544378698224854) internal successors, (762), 338 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:24,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 762 transitions. [2021-06-12 20:05:24,387 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 762 transitions. Word has length 20 [2021-06-12 20:05:24,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:24,387 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 762 transitions. [2021-06-12 20:05:24,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:24,387 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 762 transitions. [2021-06-12 20:05:24,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:05:24,388 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:24,388 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:24,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5383,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:24,588 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:24,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:24,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1849095315, now seen corresponding path program 635 times [2021-06-12 20:05:24,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:24,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046350340] [2021-06-12 20:05:24,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:24,777 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:24,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:24,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046350340] [2021-06-12 20:05:24,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046350340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:24,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132973726] [2021-06-12 20:05:24,777 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 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 [2021-06-12 20:05:24,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:05:24,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:24,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:05:24,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:25,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132973726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:25,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:25,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:05:25,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125671079] [2021-06-12 20:05:25,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:05:25,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:25,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:05:25,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:25,249 INFO L87 Difference]: Start difference. First operand 339 states and 762 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:25,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:25,984 INFO L93 Difference]: Finished difference Result 404 states and 878 transitions. [2021-06-12 20:05:25,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:05:25,985 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:05:25,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:25,985 INFO L225 Difference]: With dead ends: 404 [2021-06-12 20:05:25,985 INFO L226 Difference]: Without dead ends: 385 [2021-06-12 20:05:25,985 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 921.9ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:05:25,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-06-12 20:05:25,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 338. [2021-06-12 20:05:25,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.255192878338279) internal successors, (760), 337 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:25,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 760 transitions. [2021-06-12 20:05:25,988 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 760 transitions. Word has length 20 [2021-06-12 20:05:25,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:25,988 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 760 transitions. [2021-06-12 20:05:25,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:25,988 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 760 transitions. [2021-06-12 20:05:25,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:05:25,989 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:25,989 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:26,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5395 [2021-06-12 20:05:26,189 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:26,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:26,189 INFO L82 PathProgramCache]: Analyzing trace with hash 365960377, now seen corresponding path program 636 times [2021-06-12 20:05:26,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:26,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559257698] [2021-06-12 20:05:26,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:26,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:26,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559257698] [2021-06-12 20:05:26,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559257698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:26,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884059390] [2021-06-12 20:05:26,404 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 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 [2021-06-12 20:05:26,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:05:26,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:26,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:05:26,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:26,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884059390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:26,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:26,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:05:26,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813978865] [2021-06-12 20:05:26,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:05:26,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:26,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:05:26,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:26,889 INFO L87 Difference]: Start difference. First operand 338 states and 760 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:27,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:27,515 INFO L93 Difference]: Finished difference Result 408 states and 886 transitions. [2021-06-12 20:05:27,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:05:27,515 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:05:27,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:27,515 INFO L225 Difference]: With dead ends: 408 [2021-06-12 20:05:27,515 INFO L226 Difference]: Without dead ends: 389 [2021-06-12 20:05:27,516 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 864.4ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:05:27,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-12 20:05:27,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 339. [2021-06-12 20:05:27,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.257396449704142) internal successors, (763), 338 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 763 transitions. [2021-06-12 20:05:27,518 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 763 transitions. Word has length 20 [2021-06-12 20:05:27,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:27,518 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 763 transitions. [2021-06-12 20:05:27,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:27,518 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 763 transitions. [2021-06-12 20:05:27,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:05:27,519 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:27,519 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:27,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5407,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:27,719 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:27,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:27,719 INFO L82 PathProgramCache]: Analyzing trace with hash 529174167, now seen corresponding path program 637 times [2021-06-12 20:05:27,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:27,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218047691] [2021-06-12 20:05:27,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:28,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:28,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218047691] [2021-06-12 20:05:28,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218047691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:28,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55455384] [2021-06-12 20:05:28,085 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 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 [2021-06-12 20:05:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:28,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:05:28,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:28,589 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:28,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55455384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:28,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:28,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:05:28,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854413835] [2021-06-12 20:05:28,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:05:28,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:28,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:05:28,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:28,590 INFO L87 Difference]: Start difference. First operand 339 states and 763 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:28,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:28,995 INFO L93 Difference]: Finished difference Result 360 states and 795 transitions. [2021-06-12 20:05:28,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:05:28,996 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:05:28,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:28,996 INFO L225 Difference]: With dead ends: 360 [2021-06-12 20:05:28,996 INFO L226 Difference]: Without dead ends: 345 [2021-06-12 20:05:28,996 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 949.4ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:05:28,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-12 20:05:28,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 342. [2021-06-12 20:05:28,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.2551319648093844) internal successors, (769), 341 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:28,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 769 transitions. [2021-06-12 20:05:28,999 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 769 transitions. Word has length 20 [2021-06-12 20:05:28,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:28,999 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 769 transitions. [2021-06-12 20:05:28,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:28,999 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 769 transitions. [2021-06-12 20:05:28,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:05:28,999 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:28,999 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:29,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 638 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5419 [2021-06-12 20:05:29,200 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:29,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:29,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1123779207, now seen corresponding path program 638 times [2021-06-12 20:05:29,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:29,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823660382] [2021-06-12 20:05:29,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:29,450 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:29,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:29,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823660382] [2021-06-12 20:05:29,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823660382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:29,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213808891] [2021-06-12 20:05:29,450 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 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 [2021-06-12 20:05:29,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:29,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:29,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:05:29,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:29,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:29,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213808891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:29,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:29,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:05:29,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107773634] [2021-06-12 20:05:29,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:05:29,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:29,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:05:29,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:29,929 INFO L87 Difference]: Start difference. First operand 342 states and 769 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:30,627 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2021-06-12 20:05:30,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:30,910 INFO L93 Difference]: Finished difference Result 370 states and 811 transitions. [2021-06-12 20:05:30,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:05:30,910 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:05:30,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:30,910 INFO L225 Difference]: With dead ends: 370 [2021-06-12 20:05:30,910 INFO L226 Difference]: Without dead ends: 363 [2021-06-12 20:05:30,910 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1228.9ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:05:30,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-12 20:05:30,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 343. [2021-06-12 20:05:30,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.257309941520468) internal successors, (772), 342 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) [2021-06-12 20:05:30,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 772 transitions. [2021-06-12 20:05:30,913 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 772 transitions. Word has length 20 [2021-06-12 20:05:30,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:30,913 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 772 transitions. [2021-06-12 20:05:30,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:30,913 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 772 transitions. [2021-06-12 20:05:30,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:05:30,913 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:30,913 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:31,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5431,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:31,114 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:31,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:31,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1593846359, now seen corresponding path program 639 times [2021-06-12 20:05:31,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:31,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644777070] [2021-06-12 20:05:31,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:31,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:31,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644777070] [2021-06-12 20:05:31,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644777070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:31,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68725459] [2021-06-12 20:05:31,417 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 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 [2021-06-12 20:05:31,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:05:31,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:31,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:05:31,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:32,003 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:32,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68725459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:32,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:32,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:05:32,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658953481] [2021-06-12 20:05:32,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:05:32,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:32,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:05:32,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:32,004 INFO L87 Difference]: Start difference. First operand 343 states and 772 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:33,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:33,921 INFO L93 Difference]: Finished difference Result 447 states and 939 transitions. [2021-06-12 20:05:33,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:05:33,922 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:05:33,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:33,922 INFO L225 Difference]: With dead ends: 447 [2021-06-12 20:05:33,922 INFO L226 Difference]: Without dead ends: 409 [2021-06-12 20:05:33,922 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 2201.7ms TimeCoverageRelationStatistics Valid=215, Invalid=1677, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:05:33,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-06-12 20:05:33,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 342. [2021-06-12 20:05:33,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.2551319648093844) internal successors, (769), 341 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:33,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 769 transitions. [2021-06-12 20:05:33,925 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 769 transitions. Word has length 20 [2021-06-12 20:05:33,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:33,925 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 769 transitions. [2021-06-12 20:05:33,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:33,925 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 769 transitions. [2021-06-12 20:05:33,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:05:33,925 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:33,926 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:34,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5446 [2021-06-12 20:05:34,126 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:34,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:34,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1688053151, now seen corresponding path program 640 times [2021-06-12 20:05:34,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:34,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478407484] [2021-06-12 20:05:34,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:34,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:34,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:34,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478407484] [2021-06-12 20:05:34,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478407484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:34,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877096236] [2021-06-12 20:05:34,381 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 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 [2021-06-12 20:05:34,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:34,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:34,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:05:34,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:34,748 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-12 20:05:34,931 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:34,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877096236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:34,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:34,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:05:34,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664119137] [2021-06-12 20:05:34,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:05:34,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:34,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:05:34,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:34,932 INFO L87 Difference]: Start difference. First operand 342 states and 769 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:35,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:35,425 INFO L93 Difference]: Finished difference Result 361 states and 798 transitions. [2021-06-12 20:05:35,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:05:35,425 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:05:35,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:35,426 INFO L225 Difference]: With dead ends: 361 [2021-06-12 20:05:35,426 INFO L226 Difference]: Without dead ends: 348 [2021-06-12 20:05:35,426 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 948.1ms TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:05:35,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-12 20:05:35,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2021-06-12 20:05:35,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.253644314868805) internal successors, (773), 343 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) [2021-06-12 20:05:35,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 773 transitions. [2021-06-12 20:05:35,428 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 773 transitions. Word has length 20 [2021-06-12 20:05:35,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:35,428 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 773 transitions. [2021-06-12 20:05:35,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:35,428 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 773 transitions. [2021-06-12 20:05:35,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:05:35,429 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:35,429 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:35,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5461 [2021-06-12 20:05:35,629 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:35,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:35,629 INFO L82 PathProgramCache]: Analyzing trace with hash 110711421, now seen corresponding path program 641 times [2021-06-12 20:05:35,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:35,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874779487] [2021-06-12 20:05:35,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:35,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:35,897 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:35,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:35,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874779487] [2021-06-12 20:05:35,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874779487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:35,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254767495] [2021-06-12 20:05:35,897 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 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 [2021-06-12 20:05:35,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:05:35,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:35,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:05:35,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:36,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:36,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254767495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:36,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:36,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:05:36,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133890381] [2021-06-12 20:05:36,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:05:36,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:36,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:05:36,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:36,363 INFO L87 Difference]: Start difference. First operand 344 states and 773 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:37,247 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-06-12 20:05:37,495 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2021-06-12 20:05:37,643 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-06-12 20:05:37,794 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2021-06-12 20:05:38,041 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2021-06-12 20:05:38,452 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-06-12 20:05:38,607 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-06-12 20:05:38,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:38,626 INFO L93 Difference]: Finished difference Result 428 states and 906 transitions. [2021-06-12 20:05:38,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:05:38,626 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:05:38,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:38,627 INFO L225 Difference]: With dead ends: 428 [2021-06-12 20:05:38,627 INFO L226 Difference]: Without dead ends: 396 [2021-06-12 20:05:38,627 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 2456.5ms TimeCoverageRelationStatistics Valid=248, Invalid=1732, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:05:38,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-12 20:05:38,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 343. [2021-06-12 20:05:38,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.254385964912281) internal successors, (771), 342 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:38,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 771 transitions. [2021-06-12 20:05:38,630 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 771 transitions. Word has length 20 [2021-06-12 20:05:38,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:38,630 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 771 transitions. [2021-06-12 20:05:38,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:38,630 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 771 transitions. [2021-06-12 20:05:38,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:05:38,630 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:38,630 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:38,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5472,642 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:38,831 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:38,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:38,831 INFO L82 PathProgramCache]: Analyzing trace with hash 617057687, now seen corresponding path program 642 times [2021-06-12 20:05:38,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:38,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522104787] [2021-06-12 20:05:38,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:39,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:39,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522104787] [2021-06-12 20:05:39,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522104787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:39,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713262742] [2021-06-12 20:05:39,104 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 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 [2021-06-12 20:05:39,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:05:39,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:39,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-12 20:05:39,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:39,463 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:05:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:39,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713262742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:39,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:39,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:05:39,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801925536] [2021-06-12 20:05:39,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:05:39,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:39,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:05:39,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:39,592 INFO L87 Difference]: Start difference. First operand 343 states and 771 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:40,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:40,240 INFO L93 Difference]: Finished difference Result 386 states and 839 transitions. [2021-06-12 20:05:40,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:05:40,240 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:05:40,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:40,240 INFO L225 Difference]: With dead ends: 386 [2021-06-12 20:05:40,240 INFO L226 Difference]: Without dead ends: 375 [2021-06-12 20:05:40,241 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 998.7ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:05:40,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-12 20:05:40,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 345. [2021-06-12 20:05:40,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.252906976744186) internal successors, (775), 344 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) [2021-06-12 20:05:40,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 775 transitions. [2021-06-12 20:05:40,243 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 775 transitions. Word has length 20 [2021-06-12 20:05:40,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:40,243 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 775 transitions. [2021-06-12 20:05:40,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:40,243 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 775 transitions. [2021-06-12 20:05:40,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:05:40,244 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:40,244 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:40,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 643 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5487 [2021-06-12 20:05:40,444 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:40,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:40,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1951649017, now seen corresponding path program 643 times [2021-06-12 20:05:40,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:40,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099696782] [2021-06-12 20:05:40,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:40,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:40,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099696782] [2021-06-12 20:05:40,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099696782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:40,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50194657] [2021-06-12 20:05:40,648 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 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 [2021-06-12 20:05:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:40,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:05:40,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:40,999 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 20:05:41,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:41,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50194657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:41,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:41,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:05:41,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700570223] [2021-06-12 20:05:41,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:05:41,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:41,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:05:41,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:41,123 INFO L87 Difference]: Start difference. First operand 345 states and 775 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:42,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:42,012 INFO L93 Difference]: Finished difference Result 424 states and 902 transitions. [2021-06-12 20:05:42,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:05:42,012 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:05:42,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:42,013 INFO L225 Difference]: With dead ends: 424 [2021-06-12 20:05:42,013 INFO L226 Difference]: Without dead ends: 405 [2021-06-12 20:05:42,013 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1082.6ms TimeCoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:05:42,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-06-12 20:05:42,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 344. [2021-06-12 20:05:42,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.253644314868805) internal successors, (773), 343 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) [2021-06-12 20:05:42,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 773 transitions. [2021-06-12 20:05:42,015 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 773 transitions. Word has length 20 [2021-06-12 20:05:42,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:42,015 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 773 transitions. [2021-06-12 20:05:42,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:42,015 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 773 transitions. [2021-06-12 20:05:42,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:05:42,016 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:42,016 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:42,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5499,644 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:42,216 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:42,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:42,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1413793439, now seen corresponding path program 644 times [2021-06-12 20:05:42,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:42,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530642764] [2021-06-12 20:05:42,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:42,464 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:42,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:42,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530642764] [2021-06-12 20:05:42,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530642764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:42,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234133331] [2021-06-12 20:05:42,464 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 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 [2021-06-12 20:05:42,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:42,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:42,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 20:05:42,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-06-12 20:05:42,753 WARN L222 SmtUtils]: Removed 1 from assertion stack [2021-06-12 20:05:42,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5512 [2021-06-12 20:05:42,954 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 20:05:42,955 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 20:05:42,957 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 20:05:42,957 INFO L202 PluginConnector]: Adding new model chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 08:05:42 BasicIcfg [2021-06-12 20:05:42,957 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 20:05:42,957 INFO L168 Benchmark]: Toolchain (without parser) took 801846.23 ms. Allocated memory was 250.6 MB in the beginning and 434.1 MB in the end (delta: 183.5 MB). Free memory was 230.1 MB in the beginning and 277.3 MB in the end (delta: -47.2 MB). Peak memory consumption was 137.9 MB. Max. memory is 8.0 GB. [2021-06-12 20:05:42,957 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 250.6 MB. Free memory is still 231.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 20:05:42,958 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.17 ms. Allocated memory is still 250.6 MB. Free memory was 230.0 MB in the beginning and 228.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-12 20:05:42,958 INFO L168 Benchmark]: Boogie Preprocessor took 30.26 ms. Allocated memory is still 250.6 MB. Free memory was 228.5 MB in the beginning and 227.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:05:42,958 INFO L168 Benchmark]: RCFGBuilder took 464.96 ms. Allocated memory is still 250.6 MB. Free memory was 227.4 MB in the beginning and 205.9 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:05:42,958 INFO L168 Benchmark]: TraceAbstraction took 801317.94 ms. Allocated memory was 250.6 MB in the beginning and 434.1 MB in the end (delta: 183.5 MB). Free memory was 205.4 MB in the beginning and 277.3 MB in the end (delta: -71.9 MB). Peak memory consumption was 112.8 MB. Max. memory is 8.0 GB. [2021-06-12 20:05:42,958 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 250.6 MB. Free memory is still 231.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 28.17 ms. Allocated memory is still 250.6 MB. Free memory was 230.0 MB in the beginning and 228.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.26 ms. Allocated memory is still 250.6 MB. Free memory was 228.5 MB in the beginning and 227.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 464.96 ms. Allocated memory is still 250.6 MB. Free memory was 227.4 MB in the beginning and 205.9 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 801317.94 ms. Allocated memory was 250.6 MB in the beginning and 434.1 MB in the end (delta: 183.5 MB). Free memory was 205.4 MB in the beginning and 277.3 MB in the end (delta: -71.9 MB). Peak memory consumption was 112.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 45 for 43ms.. - 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: 801238.4ms, OverallIterations: 651, TraceHistogramMax: 5, EmptinessCheckTime: 184.2ms, AutomataDifference: 365273.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 25.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 18611 SDtfs, 39154 SDslu, 155534 SDs, 0 SdLazy, 251449 SolverSat, 14395 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 100993.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23591 GetRequests, 7441 SyntacticMatches, 1 SemanticMatches, 16149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77551 ImplicationChecksByTransitivity, 467936.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=345occurred in iteration=649, InterpolantAutomatonStates: 11002, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1349.8ms AutomataMinimizationTime, 650 MinimizatonAttempts, 23911 StatesRemovedByMinimization, 637 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2729.4ms SsaConstructionTime, 10686.4ms SatisfiabilityAnalysisTime, 277255.3ms InterpolantComputationTime, 23827 NumberOfCodeBlocks, 23827 NumberOfCodeBlocksAsserted, 2268 NumberOfCheckSat, 22534 ConstructedInterpolants, 2 QuantifiedInterpolants, 372044 SizeOfPredicates, 6772 NumberOfNonLiveVariables, 61811 ConjunctsInSsa, 22445 ConjunctsInUnsatCore, 1293 InterpolantComputations, 7 PerfectInterpolantSequences, 1779/18405 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